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= WASP @-@ 13b =
WASP @-@ 13b is an extrasolar planet that was discovered in 2008 in the orbit of the sunlike star WASP @-@ 13 . The planet has a mass of nearly half that of Jupiter , but a radius five @-@ fourths the size of Jupiter . This low relative mass might be caused by a core that is of low mass or that is not present at all .
The planet orbits at approximately 5 % of the distance between the Sun and Earth every four days . The star was observed several times between 2006 and 2009 , at first through the SuperWASP program and later through focused follow @-@ up observations . Analysis of collected radial velocity measurements led to the discovery of WASP @-@ 13b , which was reported in a journal on April 7 , 2009 . A follow @-@ up study published in 2011 investigated the cause for inflated planets such as WASP @-@ 13b , and re @-@ examined ( and re @-@ constrained ) its mass , radius , density , and age .
= = Discovery = =
Between November 27 , 2006 , and April 1 , 2007 , <unk> images of the star WASP @-@ 13 by the SuperWASP @-@ North program based at Roque de los Muchachos Observatory in the Canary Islands led to the identification of WASP @-@ 13 as host to a potentially transiting object . Photometric follow @-@ up observations were taken on February 16 , 2008 using the James Gregory Telescope ( JGT ) in Scotland , which took 1047 exposures of the star , although the last twenty images taken were obscured by cloud cover and were discarded . Using HD <unk> as a reference star along with JGT measurements , the astronomers investigating the system were able to create a light curve for the transiting planet .
WASP @-@ 13 was observed between February 11 and 15 in 2008 by the SOPHIE échelle spectrograph at the Haute @-@ Provence Observatory in France , determining the radial velocity of the transiting body . Use of the FIES <unk> spectrograph at the Nordic Optical Telescope in the Canary Islands gained other spectral measurements that yielded the characteristics of the star . Analysis of the SOPHIE and FIES data were used to constrain some of the orbiting body 's characteristics . The discovery of the orbiting body 's mass using radial velocity measurements led to its confirmation as the planet WASP @-@ 13b .
The discovery of WASP @-@ 13b was reported in the journal Astronomy and Astrophysics by the European Southern Observatory on May 19 , 2009 . The discovery paper was received by the journal on April 7 , 2009 .
Later , between 2009 and 2011 , another team of astronomers observed WASP @-@ 13b and WASP @-@ 21b to find what caused some Hot Jupiters to have anomalously high radii . The RISE photometric camera on the Liverpool Telescope was used to detect further transits . Two partial transits and two full transits were observed during this period , although the quality of both full transits was slightly compromised because of passing cloud cover . The collected observations , along with the JGT observations that were used to confirm the planet , were scaled to filter out errors such as background noise . The data was then used to re @-@ define WASP @-@ 13b 's parameters , including its age , mass , radius , and density . The study also noted that a limb darkening effect was present , a characteristic that may affect future atmospheric studies of the planet .
= = Host star = =
WASP @-@ 13 is a sunlike G @-@ type star located in the Lynx constellation . Measurements taken by FIES and SOPHIE did not constrain the mass , radius , or age well ; however , a later 2011 study using the Liverpool Telescope better @-@ constrained those parameters . The star 's mass is estimated at 1 @.@ 09 times the mass of the Sun , its radius at 1 @.@ 559 times that of the Sun , and its density at 0 @.@ 288 time 's the Sun 's density . These characteristics are re @-@ defined taking limb darkening into account . The star 's metallicity , which is measured by iron content , is placed roughly at [ Fe / H ] = 0 , similar to that of the Sun . Also , the star 's estimated effective temperature is <unk> K , slightly warmer than the Sun .
WASP @-@ 13 has an apparent magnitude of 10 @.@ 42 , making it invisible to the unaided eye as seen from Earth .
= = Characteristics = =
WASP @-@ 13b is a transiting planet with an estimated mass that is ( including limb darkening ) 0 @.@ 477 times that of Jupiter and a radius that is 1 @.@ 389 times Jupiter 's radius . The planet is , in other words , less than half the mass of Jupiter , but slightly less than fourteen tenths its size . WASP @-@ 13b 's low mass can mostly likely be attributed to the presence of a low @-@ mass core , or to the total lack of a core , according to the discovery paper . WASP @-@ 13b , which orbits its host star at a distance of 0 @.@ <unk> AU , circles its star completely every 4 @.@ <unk> days . The 2011 study on the planet recognized WASP @-@ 13b as the fifth lowest @-@ density extrasolar planet known , behind Kepler @-@ 7b ; WASP @-@ 17b ; TrES @-@ 4b ; and <unk> @-@ 5b .
WASP @-@ 13b has an orbital inclination of <unk> , which means that it orbits almost edge @-@ on as seen from Earth .
= U2 concert in Sarajevo =
On 23 September 1997 , the Irish rock band U2 held a concert at Koševo Stadium in Sarajevo , Bosnia and Herzegovina , as part of the group 's PopMart Tour . They were the first major artist to hold a concert in the city after the end of the Bosnian War . Approximately 45 @,@ 000 fans attended the show .
The band first became involved with Sarajevo in 1993 on their Zoo TV Tour ; approached by aid worker Bill Carter about bringing attention to the Siege of Sarajevo , the band conducted nightly satellite transmissions with Bosnians during their shows . These link @-@ ups were the subject of criticism from journalists for mixing entertainment with human tragedy . Although the war made it impractical for U2 to visit Sarajevo at the time , they vowed to eventually play a concert in the city . After the conflict ended in November 1995 , they made arrangements to visit Sarajevo , and with help from United Nations ambassadors and peacekeeping troops , they scheduled and played the concert in 1997 .
The band offered to hold a benefit concert or small show in Sarajevo , but it was requested that they stage a full PopMart concert . The performance consequently featured the tour 's extravagant stage , and the band played a set list typical of the tour . The show brought together people of different ethnicities who had previously clashed during the war , and train service was temporarily resumed to allow concertgoers to attend . Among the songs played was " Miss Sarajevo " , written by U2 and Brian Eno about a beauty pageant held during the war . Although the band were displeased with their performance and lead vocalist Bono had vocal difficulties , the concert was well received and was credited with improving morale among Bosnians . The members of U2 consider the show to be among their proudest moments . The concert was lauded by Bosnians .
= = Background = =
= = = War in Sarajevo = = =
Socialist Federal Republic of Yugoslavia was composed of six constituent republics : Bosnia @-@ Herzegovina , Croatia , Macedonia , Montenegro , Serbia , and Slovenia . In 1991 , Croatia , and Slovenia seceded from Yugoslavia . Bosnia @-@ Herzegovina — a republic with a mixed population consisting of Bosniaks , Serbs , and Croats — followed suit in March 1992 in a highly controversial referendum , creating tension in the ethnic communities . Bosnian Serb militias , whose strategic goal was to secede from Bosnia and Herzegovina and unite with Serbia , encircled Sarajevo with a siege force of 18 @,@ 000 stationed in the surrounding hills , from which they assaulted the city with weapons that included artillery , mortars , tanks , anti @-@ aircraft guns , heavy machine @-@ guns , rocket launchers , and aircraft bombs . From 2 May 1992 until the end of the war in 1996 , the city was blockaded . The Army of the Republic of Bosnia and Herzegovina , numbering roughly 40 @,@ 000 inside the besieged city , was poorly equipped and unable to break the siege . Meanwhile , throughout the country , thousands of predominantly Bosniak civilians were driven from their homes in a process of ethnic cleansing . In Sarajevo , women and children attempting to buy food were frequently terrorized by Bosnian Serb sniper fire .
= = = U2 's reaction = = =
In 1993 , U2 were in Europe for the " Zooropa " leg of their Zoo TV Tour . Before their 3 July show in Verona , Italy , the band received a fax from Radio Televizija Bosne I Hercegovina asking for an interview regarding the situation in Bosnia . The band agreed and met with an American aid worker named Bill Carter , who acted as the station 's foreign associate , due to Serbian travel restrictions . Carter described his experiences in Sarajevo helping Bosnians while surviving the dangerous living conditions . Lead vocalist Bono was unnerved to hear that those living in makeshift bomb shelters in the city played music , including U2 's , at loud volumes to drown out the sound of explosions . While in Sarajevo , Carter had seen a television interview on MTV in which Bono mentioned the theme of the Zooropa tour leg was a unified Europe . Feeling that such an aim was empty if ignoring the Bosnians ' plight , Carter sought Bono 's help . He requested that U2 go to Sarajevo to bring attention to the war and break the " media fatigue " that had occurred from covering the conflict .
Bono agreed to Carter 's request without asking the rest of the band , and when informed of the idea , the other members gave only tacit approval . They briefly considered playing an impromptu concert in the city , with Bono suggesting that they perform in the bunker where Carter and his friends hid during the siege . He said , " even if all we get is some extra attention for Bosnia on MTV , that 's something " . The idea fell through when it was pointed out that the logistics of transporting their equipment into the city were impossible , as the only way into Sarajevo was on a United Nations plane . Manager Paul McGuinness realized that even if the band managed to organize a concert , it would endanger their lives and those of the audience and the Zoo TV crew . As he explained , " U2 's effort to discuss any humanitarian issue have sometimes been accompanied by a false instinct that U2 is also obliged to resolve that issue . Going to Sarajevo seems to me to fall into that category . I think it would endanger the people we go with , endanger the tour , and endanger the band . " Drummer Larry Mullen , Jr. feared that the move would look like a publicity stunt .
Instead , the group agreed to use the tour 's satellite dish to conduct live video transmissions from their concerts to Carter in Sarajevo . Carter returned to the city and assembled a video unit . The band purchased a satellite dish to be sent to Sarajevo and paid a £ 100 @,@ 000 fee to join the European Broadcasting Union ( EBU ) . Once set up , the band began satellite link @-@ ups to Sarajevo on nearly a nightly basis , the first of which aired on 17 July 1993 in Bologna , Italy . To connect with the EBU satellite , Carter and two co @-@ workers were forced to visit the Sarajevo television station at night and to film with as little light as possible to avoid the attention of snipers and bombers . To reach the building , they had to traverse an area known as " Sniper Alley " . This was done a total of 12 times over the course of a month . During the broadcasts , Carter discussed the deteriorating situation in the city , and Bosnians often spoke to U2 and their audience . These grim interviews starkly contrasted with the rest of the show ; concerts on the Zoo TV Tour were elaborately staged multimedia events that satirised television and the audience 's over @-@ stimulation . Most of the shows were scripted , but the link @-@ ups to Sarajevo were not , leaving the group unsure who would speak or what they would say . U2 stopped the broadcasts in August 1993 after learning that the Siege of Sarajevo was being reported on the front of many British newspapers . Though this trend had begun before the band 's first Sarajevo transmission , Nathan Jackson suggested that U2 's actions had brought awareness of the situation to their fans and to the British public indirectly .
Reactions to the transmissions were mixed . Many fans felt the transmissions disrupted the flow of the concerts . Most of the British press was highly critical . One writer for NME wrote , " The Bosnian linkup was beyond bad taste . It was insulting . " Bono thought that they were bringing the public 's attention to an important event , though he admitted that the link @-@ ups were the most difficult thing the band had done in their career . Guitarist The Edge said , " We don 't normally see that kind of cold hard news . We get a very sanitized , editorialized take on everything ... When you watch the television news , you are getting something palatable , whereas this was really quite unpalatable most of the time . And for that reason I think it affected people very much , including us . " Mullen worried that the band were exploiting the Bosnians ' suffering for entertainment . During a transmission from the band 's concert at Wembley Stadium , three women in Sarajevo asked what the band intended to do to help before telling Bono , " We know you 're not going to do anything for us . You 're going to go back to a rock show . You 're going to forget that we even exist . And we 're all going to die . " During a transmission to a Glasgow concert , a Bosnian woman told the concert audience , " We would like to hear the music , too , but we hear only the screams of wounded and tortured people and raped women . " Some people were upset by the circumstances of Sarajevo and were motivated to join the War Child charity project , including U2 producer Brian Eno . Despite U2 's obligation to the tour and their inability to perform in Sarajevo during the war , they vowed to play the city someday .
The band contributed to Bosnian relief efforts to enhance humanitarian and public awareness of the issue , and Bono and Carter subsequently collaborated on the documentary Miss Sarajevo , which showcased the war @-@ torn city during Carter 's six months living there . In 1995 , U2 and Eno wrote the song " Miss Sarajevo " as a response to " the surreal acts of defiance that had taken place during the siege of Sarajevo " . One such act was a beauty pageant organized by Bosnian women who planned to fight the war with their " lipstick and heels " . During the pageant , all of the participants walked onto the stage carrying a banner that said , " Don 't let them kill us " . The winner of the pageant , 17 @-@ year @-@ old <unk> Nogić , later said the pageant " was a crazy thing to do during a war . But we tried to live a normal life . It was some kind of a defence mechanism we all had . " Years later , Bono said , " It was pure Dada and it deserved to be celebrated in song . " Of the song 's meaning , he said , " Everywhere people had heard their call for help — but help never came . That was the feeling . I had tried to tackle subjects like this head @-@ on , but I 'd learnt a lesson . You have to try and make the same points , in a different , less direct , more surrealist way . " " Miss Sarajevo " was recorded with Luciano Pavarotti and released as the first single from U2 's side @-@ project with Eno entitled Original Soundtracks 1 ; the record was released under the pseudonym " Passengers " .
= = Scheduling and preparations = =
As the Bosnian War ended in 1995 and the Siege of Sarajevo in 1996 , the stability of the region began to improve . Realizing this , U2 began to plan a concert for Sarajevo that would take place on their 1997 PopMart Tour . Although they were the first major musical artist to perform in the city following the war , China Drum had played a concert in July 1996 . Music journalist Andrew Mueller described China Drum 's experience in a single van as a " logistical and administrative nightmare " . Muhamed Sacirbey , the Bosnian Ambassador to the United Nations , helped U2 make arrangements , playing an informal role as promoter and organizer . McGuinness said , " We thought it was going to be quite difficult . But it 's been quite straightforward . People have just wanted to help . We 've <unk> a lot of equipment , forklifts and so on , from the military , and the local crew have been incredibly supportive . "
Scheduling the concert meant a financial loss of £ 500 @,@ 000 for the band , despite sponsorship from Coca @-@ Cola and GSM . Ticket prices were set at just DM 8 ( £ 8 , US $ 18 ) , because of the 50 percent unemployment rate in the city . Bono offered for the group to perform a benefit concert or small show in Sarajevo , but the city requested they hold the full PopMart show . Bono said , " We offered to do a charity gig here , just turn up and do a scratch gig , but they wanted the whole fucking thing . They wanted the lemon ! " McGuinness added , " we felt it was important that we treat this as another city on the tour , to pay them that respect . To come here and not do the whole show would have been rude . " According to news releases following the concert , the total net income for the show was US $ 13 @,@ 500 ; however , tour promoter John Giddings noted that price did not include the costs of the production or transportation .
As late as July 1997 , U2 were pressured to accept an offer of approximately $ 4 million to perform in Basel , Switzerland on the date scheduled for the Sarajevo show . At the time , rumours about the region 's instability persisted . To ensure the Sarajevo show was not canceled , Sacirbey appeared at many of the band 's preceding shows to lobby on behalf of the city . For the stage to reach Sarajevo , the road crew had to drive the equipment and stage through war @-@ torn Bosnia . Although the trip was without incident , they had to pass through towns such as Mostar , which had been " obliterated " during the war . Stage and lighting designer Willie Williams commented that " when the truck drivers arrived you could see that they were changed men " . The only trouble in transporting the stage came when a border control agent prevented them from crossing the border for hours . The trucks reached Sarajevo two days prior to the concert , arriving to the cheers and applause of the city 's residents ; their arrival was the first concrete evidence that the band were keeping their promise to play there . McGuinness explained , " This is a city that 's been disappointed so many times there were a lot of people who weren 't prepared to believe the gig was going to take place until they saw the stage going up . " Until then , tickets had sold very slowly , but within 24 hours of the trucks ' arrival , another 8 @,@ 000 tickets were sold . Despite this , a day before the concert , 15 @,@ 000 tickets remained unsold . Three @-@ hundred local residents were employed to help assemble the stage and promote the show .
Several hundred members of the international " Stabilisation Force " ( SFOR ) were tasked with upholding the Dayton Agreement for the concert . The band were overwhelmed by the sights they saw when arriving . During the war , Koševo Stadium was used as a morgue , and graveyards were present on either sides . Although the venue had escaped the worst of the shelling , the nearby Olympic Hall <unk> had been badly damaged during the war . Despite its condition , U2 used the building for their dressing rooms and offices . Following the concert , it was used to provide lodging for 3 @,@ 000 fans . The band 's hotel , a nearby Holiday Inn , had been shelled during the siege , and part of the building had been destroyed as a result . The walls in Mullen 's room were punctured with mortar shrapnel , and sections of the floor were also missing . Prior to the show , Sacirbey took Mullen on a tour of the city , showing him the Sarajevo Roses embedded in the streets .
On the day of the concert , trains ran into Sarajevo for the first time since the start of the war . Two lines were opened , one from Mostar to Sarajevo and the other from <unk> to Sarajevo . Although the railways had been functional for the duration of the war , Muslim and Croat politicians could not decide who would operate them . As a result , the trains were only run on the date of the concert to bring fans to the city , and the day after to take them home again . Visa requirements were temporarily suspended . An effort was made to include all of the country 's ethnic groups at the concert . Approximately 500 fans crossed the ethnic boundary lines between Bosnia 's Serb Republic and the Moslem @-@ Croat Federation . People from several of the other Yugoslavian republics went to Sarajevo for the concert , with buses carrying fans from Zagreb , Croatia and Ljubljana , Slovenia . Security around the event was strict . SFOR soldiers searched for bombs with sniffer dogs , and the buildings around the stadium were lined with Irish troops and sharpshooters in case violence broke out .
= = Concert overview = =
The concert was held on 23 September 1997 , and approximately 45 @,@ 000 people attended . It was broadcast in Bosnia by local television networks , as well as globally by BBC . During the event , 10 @,@ 000 soldiers stood on the left side of the stadium to ensure no conflicts broke out . At <unk> , a decision was made to open the stadium gates to all , allowing approximately 10 @,@ 000 more fans who could not afford the concert or who had not purchased tickets in time to attend . In addition to the local and foreign fans , 6 @,@ 000 off @-@ duty SFOR soldiers attended the event in uniform . <unk> Nogić attended the concert and arrived in a limo with the band . The concert was broadcast live internationally on radio , and all proceeds from the radio sales were donated to the War Child project .
Three opening acts played before U2 , beginning with the Gazi <unk> @-@ Beg choir , an Islamic choir from a local high school . Their performance was followed by two local bands , Protest and <unk> , one of which was chosen personally by Sacirbey , and the other which was selected through a radio contest . Following the opening acts , musician Howie B performed a DJ set before U2 took the stage .
The band 's set list was similar to that of most shows on the PopMart Tour , but with " Sunday Bloody Sunday " in place of The Edge 's karaoke segment and the addition of " Miss Sarajevo " in the second encore . The night was a celebration of the end of the war , with Bono setting the tone by shouting out " Viva Sarajevo ! Fuck the past , kiss the future ! " at the beginning of " Even Better Than the Real Thing " . Bono had struggled with his voice throughout the tour , and the morning of the concert he woke up " without a voice " . There was no intent to cancel , and the show went ahead as planned . Though Bono had few difficulties through the opening quartet of " Mofo " , " I Will Follow " , " Gone " , and " Even Better Than the Real Thing " , his voice gave out during " Last Night on Earth " . In 2006 , The Edge suggested that Bono 's vocal troubles had been caused by laryngitis or by the stress of the previous few months of touring , though he later remarked that " it didn 't really matter that our lead singer was under the weather because every member of the audience seemed to join in on every song . There was a mass chorus for the whole concert . "
At various points during " Until the End of the World " and " New Year 's Day " , Bono gestured for the audience to help him with the vocals , and by the eighth song of the night , " Pride ( In the Name of Love ) " , he was reduced to speaking the lyrics instead of singing them . The band continued with their standard set list by playing " I Still Haven 't Found What I 'm Looking For " , " Stand By Me " , " All I Want Is You " , and " Staring at the Sun " . U2 considered playing " Desire " after " All I Want Is You " , but they chose not to perform the song . The Edge then performed a solo version of " Sunday Bloody Sunday " . The rendition was slower and quieter than the studio version . During the song , Bono went backstage for cortisone injections , which helped to improve his voice for a short time . Brian Eno was prepared to go on stage to replace Bono if he could not continue , or to sing alongside him . Bono ultimately returned to the stage alone for the next song , " Bullet the Blue Sky " , and the band continued with renditions of " Please " and " Where the Streets Have No Name " , which concluded the main set .
In the interlude before the first encore , U2 had a worried discussion over the introduction to " Miss Sarajevo " . The song had only been played once prior — at a benefit concert in 1995 with Bono , The Edge , Eno , and Pavarotti . They returned to the stage and played " Discothèque " , " If You Wear That Velvet Dress " , " With or Without You " , and a rough version of " Miss Sarajevo " . Pavarotti was not at the concert to sing his part and so an antique gramophone was brought onto the stage in his place . Eno came on stage to sing backing vocals , and Bono invited Nogić on stage during the chorus . During the song , the video screen showed images from Carter 's Miss Sarajevo documentary , including footage of the girls taking part in the beauty contest and the banner reading " Please don 't let them kill us " . Bono apologized for the rocky performance at the end of the song , saying " Sarajevo , this song was written for you . I hope you like it , because we can 't fucking play it . " The concert concluded with a second encore of " Hold Me , Thrill Me , Kiss Me , Kill Me " , " Mysterious Ways " , " One " , and an abbreviated cover of " Unchained Melody " .
After the band had walked offstage , in a move described by NME as the most meaningful of the concert , the audience faced the troops in the stadium and broke into a spontaneous round of applause , which quickly turned into an ovation — an act which the soldiers mimicked in turn .
= = Reaction = =
The day after the concert in Sarajevo , a local newspaper carried an editorial which was headlined , " Today was the day the siege of Sarajevo ended " . In reaction to the event , a Bosnian student told members of the international press , " I felt excluded from the world for so long . It 's not only about U2 . It 's the feeling of being part of the world . " A local resident said that the concert was " proof that we have peace here , that everything is OK " . Fans from outside the former Yugoslavia described Sarajevo as " an oasis of light " in the midst of destroyed and fire @-@ damaged buildings , and deserted villages . Despite the subpar performance , the Associated Press said , " For two magical hours , the rock band U2 achieved what warriors , politicians and diplomats could not : They united Bosnia . " Andrew Mueller of The Independent wrote , " For the first time since the start of the war in 1992 , people more accustomed to seeing each other through the sights of a rifle were converging on the capital to listen to music together . It was a reminder of prewar Sarajevo , home to some of old Yugoslavia 's best rock bands . " Sacirbey stated that he was satisfied that the concert " was held to promote a sense of normalcy , peace and reconciliation in Sarajevo and not to raise money . " He also expressed thanks on behalf of President Alija Izetbegović , who described the concert as a " landmark event " .
Mullen and The Edge both agreed that playing the Sarajevo concert had been the highlight of their careers ; Mullen said , " [ t ] here 's no doubt that that is an experience I will never forget for the rest of my life . And if I had to spend 20 years in the band just to play that show , [ ... ] I think it would have been worthwhile . " Bono described it as " one of the toughest and one of the sweetest nights of my life " , saying of the audience , " I think they wanted , more than anything , a return to normalcy . That 's what these people want , it 's what they deserve . " He also speculated that the loss of his voice had " allowed room for Sarajevo to take the gig away from us . They could see that things could go horribly wrong , they 'd gone to a lot of trouble to come here , and they were just going to make it happen . And they did . " After the completion of the PopMart Tour , he said , " it was amazing and confounding to discover that on our most ' pop ' of tours some of the best shows were in political hotspots like Santiago , Sarajevo , Tel Aviv [ ... ] anywhere music meant more than entertainment " . Following the concert , President Izetbegović presented Bono with an honorary Bosnian passport , in recognition of his humanitarian efforts during the war .
= = Legacy = =
The peaceful nature of the U2 concert was fleeting , as violence flared up in the region the following year with the Kosovo War . NATO troops remained in Sarajevo until 2004 , while European Union peace @-@ keeping troops remain in the city .
Following the Sarajevo concert , The Edge 's solo performance of " Sunday Bloody Sunday " was performed at the majority of shows for the remainder of the tour , and a recording of the song from the Sarajevo concert was released on the CD single for " If God Will Send His Angels " on 8 December 1997 ; The Edge later stated the band had " rediscovered " the song in Sarajevo after his solo performance . A short documentary about the concert , Missing Sarajevo , was included on the DVD release of U2 's 2002 video compilation , The Best of 1990 @-@ 2000 .
After U2 first performed " Miss Sarajevo " at the Sarajevo concert , it was not performed again until the second leg of the Vertigo Tour in 2005 . U2 did not return to perform in any country in the former Yugoslavia until August 2009 , when they performed two shows in Zagreb during the U2 360 ° Tour . During the Zagreb shows , Bono stated that his honorary Bosnian passport was one of his " most treasured possessions " , which prompted the country 's Council of Ministers to announce that his passport was to be revoked , citing how country 's laws do not allow honorary <unk> to be conferred .
= Frank Slide =
The Frank Slide was a rockslide that buried part of the mining town of Frank , Alberta , Canada . The province of Alberta was not created until September 1905 , more than two years after the slide . The community was still part of the Northwest Territories when the incident occurred at 4 : 10 am on April 29 , 1903 . Over 82 million tonnes ( 90 million tons ) of limestone rock slid down Turtle Mountain within 100 seconds , obliterating the eastern edge of Frank , the Canadian Pacific Railway line and the coal mine . It was one of the largest landslides in Canadian history and remains the deadliest , as between 70 and 90 of the town 's residents were killed , most of whom remain buried in the rubble . Multiple factors led to the slide : Turtle Mountain 's formation left it in a constant state of instability . Coal mining operations may have weakened the mountain 's internal structure , as did a wet winter and cold snap on the night of the disaster .
The railway was repaired within three weeks and the mine was quickly reopened . The section of town closest to the mountain was relocated in 1911 amid fears that another slide was possible . The town 's population nearly doubled its pre @-@ slide population by 1906 , but dwindled after the mine closed permanently in 1917 . The community is now part of the Municipality of Crowsnest Pass in the Province of Alberta and has a population around 200 . The site of the disaster , which remains nearly unchanged since the slide , is now a popular tourist destination . It has been designated a Provincial Historic Site of Alberta and is home to an interpretive centre that receives over 100 @,@ 000 visitors annually .
= = Background = =
The town of Frank was founded in the southwestern corner of the District of Alberta , a subdivision of the Northwest Territories in 1901 . A location was chosen near the base of Turtle Mountain in the Crowsnest Pass , where coal had been discovered one year earlier . It was named after Henry Frank who , along with Samuel <unk> , owned the Canadian @-@ American Coal and Coke Company , which operated the mine that the town was created to support . The pair celebrated the founding of the town on September 10 , 1901 , with a gala opening that featured speeches from territorial leaders , sporting events , a dinner and tours of the mine and planned layout for the community . The Canadian Pacific Railway ( CPR ) ran special trains that brought over 1 @,@ 400 people from neighbouring communities to celebrate the event . By April 1903 , the permanent population had reached 600 , and the town featured a two @-@ storey school and four hotels .
Turtle Mountain stands immediately south of Frank . It consists of an older limestone layer folded over on top of softer materials such as shale and sandstone . Erosion had left the mountain with a steep overhang of its limestone layer . It has long been unstable ; the Blackfoot and <unk> peoples called it " the mountain that moves " and refused to camp in its vicinity . In the weeks leading up to the disaster , miners occasionally felt rumblings from within the mountain , while the pressure created by the shifting rock sometimes caused the timbers supporting the mine shafts to crack and splinter .
= = Rockslide = =
In the early morning hours of April 29 , 1903 , a freight train pulled out of the mine and was slowly making its way towards the townsite when the crew heard a deafening rumble behind them . The engineer instinctively set the throttle to full speed ahead and sped his train to safety across the bridge over the Crowsnest River . At 4 : 10 am , 30 million cubic metres ( 82 million tonnes ) of limestone rock broke off the peak of Turtle Mountain . The section that broke was 1 @,@ 000 metres ( 3 @,@ 300 ft ) wide , 425 metres ( 1 @,@ 394 ft ) high and 150 metres ( 490 ft ) deep . Witnesses to the disaster claimed it took about 100 seconds for the slide to reach up the opposing hills , indicating the mass of rock traveled at a speed of about 112 kilometres per hour ( 70 mph ) . The sound was heard as far away as Cochrane , over 200 kilometres ( 120 mi ) north of Frank .
Initial reports on the disaster indicated that Frank had been " nearly wiped out " by the mountain 's collapse . It was thought the rockslide was triggered by an earthquake , volcanic eruption or explosion within the mine . The majority of the town survived , but the slide buried buildings on the eastern outskirts of Frank . Seven cottages were destroyed , as were several businesses , the cemetery , a 2 @-@ kilometre ( 1 @.@ 2 mi ) stretch of road and railroad tracks , and all of the mine 's buildings .
Approximately 100 people lived in the path of destruction , located between the CPR tracks and the river . The death toll is uncertain ; estimates range between 70 and 90 . It is the deadliest landslide in Canadian history and was the largest until the Hope Slide in 1965 . It is possible that the toll may have been higher , since as many as 50 transients had been camped at the base of the mountain while looking for work . Some residents believed that they had left Frank shortly before the slide , though there is no way to be certain . Most of the victims remain entombed beneath the rocks ; only 12 bodies were recovered in the immediate aftermath . The skeletons of six additional victims were unearthed in 1924 by crews building a new road through the slide .
Initial news reports stated that between 50 and 60 men were within the mountain and had been buried with no hope of survival . In reality , there were 20 miners working the night shift at the time of the disaster . Three had been outside the mine and were killed by the slide . The remaining 17 were underground . They discovered that the entrance was blocked and water from the river , which had been dammed by the slide , was coming in via a secondary tunnel . They unsuccessfully tried to dig their way through the blocked entrance before one miner suggested he knew of a seam of coal that reached the surface . Working a narrow tunnel in pairs and threes , they dug through the coal for hours as the air around them became increasingly toxic . Only three men still had enough energy to continue digging when they broke through to the surface late in the afternoon . The opening was too dangerous to escape from due to falling rocks from above . Encouraged by their success , the miners cut a new shaft that broke through under an outcropping of rock that protected them from falling debris . Thirteen hours after they were buried , all 17 men emerged from the mountain .
The miners found that the row of cottages that served as their homes had been devastated and some of their families killed , seemingly at random . One found his family alive and safe in a makeshift hospital , but another emerged to discover his wife and four children had died . Fifteen @-@ year @-@ old Lillian Clark , working a late shift that night in the town 's boarding house , had been given permission to stay overnight for the first time . She was the only member of her family to survive . Her father was working outside the mine when the slide hit , while her mother and six siblings were buried in their home . All 12 men living at the CPR work camp were killed , but 128 more who were scheduled to move into the camp the day before the slide had not arrived — the train that was supposed to take them there from Morrissey , British Columbia , failed to pick them up . The Spokane Flyer , a passenger train heading west from Lethbridge , was saved by CPR brakeman Sid <unk> , one of two men who rushed across the rock @-@ strewn ground to warn the train that the track had been buried under the slide . Through falling rocks and a dust cloud that impaired his visibility , <unk> ran for 2 kilometres ( 1 @.@ 2 mi ) to warn the oncoming locomotive of the danger . The CPR gave him a letter of commendation and a $ 25 cheque in recognition of his heroism .
= = = Aftermath = = =
Early on April 30 a special train from Fort Macleod arrived with police officers and doctors . Premier Frederick Haultain arrived at the disaster site on May 1 , where he met with engineers who had investigated the top of Turtle Mountain . Though new fissures had formed at the peak , they felt there was limited further risk to the town ; the CPR 's chief engineer was convinced that Frank was in imminent danger from another slide . Siding with the latter , Haultain ordered the town evacuated , and the Geological Survey of Canada ( GSC ) sent two of its top geologists to investigate further . They reported that the slide had created two new peaks on the mountain and that the north peak , overlooking the town , was not in imminent danger of collapse . As a result , the evacuation order was lifted on May 10 and Frank 's citizens returned . The North @-@ West Mounted Police , reinforced by officers who arrived from Cranbrook , Macleod and Calgary , kept tight control of the town and ensured that no cases of looting occurred during the evacuation .
Clearing the Canadian Pacific Railway line was of paramount importance . Approximately 2 kilometres ( 1 @.@ 2 mi ) of the main line had been buried under the slide , along with part of an auxiliary line . The CPR had the line cleared and rebuilt within three weeks . Intent on reopening the mine , workers opened passageways to the old mine works by May 30 . To their amazement , they discovered that Charlie the horse , one of three who worked in the mine , had survived for over a month underground . The horse had subsisted by eating the bark off the timber supports and by drinking from pools of water . The horse died when his rescuers overfed him on oats and brandy .
The town 's population not only recovered but grew ; the 1906 census of the Canadian Prairies listed the population at 1 @,@ 178 . A new study commissioned by the Dominion government determined that the cracks in the mountain continued to grow and that the risk of another slide remained . Consequently , parts of Frank closest to the mountain were dismantled or relocated to safer areas .
= = Causes = =