(CNN) Investigators are learning more about the speeding Amtrak train that derailed in Philadelphia, killing eight and sending over 200 to the hospital, but the jury is still out on the big questions. 
 
 Why did the train accelerate as it approached a curve? Did the engineer cause the train to speed up, or was there a mechanical failure? Was there something about the track that caused the crash? 
 
 "What I believe is a very good way to interview people is, honestly, to not ask them questions, to basically give them a figurative blank sheet of paper and ask them what they recall," Sumwalt said Thursday. "Really, we want to know his account of what he recalls leading into this tragic accident." 
 
 Investigators are looking at a "good quality video" that shows the train speeding up in the moments leading up to its derailment. They don't know yet what caused the train to accelerate to more than 100 mph. Sumwalt said 65 seconds before the end of the recording, the train speed went above 70 mph, and then steadily increased. 
 
 "It just shows the speed alone," Sumwalt said. "It doesn't tell how the speed got there." 
 
 'No recollection' of crash 
 
 Bostian's lawyer told ABC's "Good Morning America" his client "has absolutely no recollection whatsoever" after losing consciousness in Tuesday night's crash. 
 
 "He remembers coming into the curve (and) attempting to reduce speed," attorney Robert Goggin said. "... The last thing he recalls is coming to, looking for his bag, getting his cell phone, turning it on and calling 911." 
 
 Initial data show the train barreled into a curve at about 106 mph, Sumwalt said. That's more than twice the 50-mph speed limit for the curve, and above the 80-mph limit immediately before it. 
 
 The engineer of the Amtrak train was identified as Brandon Bostian, 32, of New York. 
 
 The engineer can't recall engaging the emergency brake, even though Sumwalt has said he did so "just moments" before the train derailed. Goggin thinks his client's memories may return as he recovers from a concussion. Bostian has 15 staples in his head, stitches in one leg and his other leg immobilized, according to his lawyer. 
 
 Goggin insisted his client hadn't been talking or texting on his phone before he made the 911 call. Nor did he have other notable accidents or mishaps. And his lawyer said Bostian voluntarily took a blood test and there was "no drinking, no drugs, no medical conditions. Nothing." 
 
 Mayor Michael Nutter said the engineer did "a pretty short interview (then) indicated that he didn't want" to talk more. The mayor noted Bostian survived after his engine car "tumbled over and over" and that he doesn't have to offer more information right away. 
 
 "He doesn't have to be interviewed if he doesn't want to at this particular stage," Nutter said. "That's kind of how the system works." 
 
 Goggin says his client, who will talk with investigators "when they ask," already told them "everything he knew. He cooperated fully." 
 
 8th body pulled from the wreckage 
 
 The train, which was on time on its trip Washington to New York, was carrying 238 passengers and five crew members when it derailed at about 9:30 p.m. Tuesday. Survivors recalled an otherwise sleepy, mundane ride devolving into chaos as cars tilted and toppled, sending most everything -- from luggage to laptops, from phones to people -- flying. 
 
 Eight people died . They include Associated Press video software architect Jim Gaines, U.S. Naval Academy Midshipman Justin Zemser and Derrick Griffith, a dean of student affairs for City University of New York Medgar Evers College. 
 
 The latest fatality is a person pulled from the wreckage of the first car Thursday morning. City Fire Commissioner Derrick Sawyer said a call came in around 8 a.m. "to bring back our cadaver dog," and after that "we were able to find another passenger in the wreckage." That body was taken to the medical examiner's office. 
 
 With that discovery, Nutter said all 243 people thought to have been on the train are accounted for. At least six people remain in critical condition. But most of the more than 200 people injured have been or will soon be released from hospitals. 
 
 "I want to express my gratitude for the first responders, who raced to save lives, and for the many passengers who, despite their own injuries, made heroic efforts to get fellow passengers to safety," President Barack Obama said Thursday, offering prayers for the victims. 
 
 Mayor calls engineer's driving 'reckless,' NTSB fires back 
 
 Bostian, the engineer, is among those recovering. As he does, Philadelphia's mayor singled him out. 
 
 In a CNN interview Wednesday, Nutter called the engineer's driving "reckless," adding, "There's no way in the world he should have been going that fast into the curve." 
 
 "I don't know what was going on with him. I don't know what was going on in the cab, but there's really no excuse that can be offered, literally, unless he had a heart attack." 
 
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 Sumwalt, the NTSB board member, immediately blasted the mayor's comments as inflammatory. 
 
 "You're not going to hear the NTSB making comments like that," he said. "We want to get the facts before we start making judgments." 
 
 Nutter referenced his CNN comments during a Thursday afternoon press conference, insisting he has the utmost respect for Sumwalt and the NTSB. He said he'd spoken "from the heart" in the "heat of the moment," expressing an opinion as the mayor and as a citizen. 
 
 "In no way, shape or form should my comments be taken as to be judgmental about their process or what might happen or anything else. I often speak from the heart," Nutter said, adding he was not interested in a public back-and-forth with the NTSB. "It is literally meaningless in the whole scheme of things." 
 
 Inconvenience for travelers, big hit for Amtrak 
 
 For all the high emotions in Philadelphia, things were decidedly calmer at that city's main train station and those in Washington and New York -- because many trains simply weren't running. 
 
 New York's Penn Station was relatively sedate for a weekday, as evident by rows of empty seats and Amtrak ticket counters. Local trains ran as normal, and other workarounds were in place -- such as New Jersey Transit honoring Amtrak tickets between New York City and Trenton, New Jersey. 
 
 For many travelers, it was an inconvenience. But it's a big deal, and a big loss, for Amtrak. 
 
 The entity also known as the National Railroad Passenger Corporation had more than 31 million passengers between October 2012 and September 2013. Far and away, its Northeast Corridor is its busiest stretch, with more than a third of all passengers. 
 
 Thus, Amtrak's three busiest stations -- Penn Station, Philadelphia's 30th Street Station and Washington's Union Station, with annual riderships between 10 and 4 million each -- are also the hardest hit. 
 
 Amtrak CEO Joe Boardman said the crash was Amtrak's first in the Northeast Corridor in 28 years, during which time 300 million passengers had ridden its rails. He expects they'll be able to do so again next week, starting with limited service between Philadelphia and New York on Monday. 
 
 "We're really looking at full service by Tuesday," Boardman said. 
 
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 Official: Technology could have prevented crash 
 
 The derailment was Amtrak's ninth this year, according to the Federal Railroad Administration . But it's not just Amtrak. The FRA notes, for example, there were 35 derailments nationwide on main railways in a single month, January 2014. 
 
 It happened again Thursday morning, when several cars from a cargo train jumped the track in Pittsburgh's Hazelwood neighborhood, city spokesman Timothy McNulty said. That derailment was relatively minor: McNulty said there were "no passengers, no hazmat, no hazard." 
 
 But incidents such as the one in Philadelphia highlight questions about whether the nation's rail infrastructure is adequate. 
 
 Transportation analyst Matthew L. Wald said the area where the train derailed Tuesday has had problems, calling it "an extremely heavily used stretch of track." While acknowledging some rails need to be replaced and curves are worn, Boardman told CNN that, overall, the railway there is "in good condition." 
 
 In addition to the track's condition, there's a matter of the technology tied to it. Many have noted this stretch did not have an automated speed control system called positive train control that could have overridden human errors and slowed the train down. 
 
 In 2008, Congress ordered the nation's railroads to adopt positive train control by December 2015 -- but it's looking increasingly unlikely that the deadline will be met 
 
 "We feel that had such a system been installed in this section of track," NTSB board member Sumwalt said, "this accident would not have occurred." 
 
 That will happen by year's end, Amtrak's Boardman pledged. 
 
 "We're very close to being able to cut it in," Boardman said, noting that such technology already exists elsewhere in the Amtrak system. "... We will complete this." ||||| PHILADELPHIA (AP) — In the moment the Amtrak train that derailed at a curve this week was supposed to be slowing down, it was accelerating, investigators said Thursday. 
 
 Investigators examine the scene of a deadly train wreck, Wednesday, May 13, 2015, in Philadelphia. Federal investigators arrived Wednesday to determine why an Amtrak train jumped the tracks in Tuesday... (Associated Press) 
 
 In this Aug. 21, 2007 photo, Amtrak assistant conductor, Brandon Bostian stands by as passengers board a train at the Amtrak station in St. Louis. Federal investigators have determined that an Amtrak... (Associated Press) 
 
 Amtrak assistant conductor, Brandon Bostian stands by as Sandra Palmer, center, says goodbye to her boyfriend, Clyde Simpson, before he boards the train at the Amtrak station in St. Louis. Federal investigators... (Associated Press) 
 
 Emergency personnel work at the scene of a deadly train derailment, Wednesday, May 13, 2015, in Philadelphia. The Amtrak train, headed to New York City, derailed and crashed in Philadelphia on Tuesday... (Associated Press) 
 
 As Philadelphia Mayor Michael Nutter, left, and Pennsylvania Gov. Tom Wolf, right, listen Amtrak CEO, Joseph Boardman expresses his sorrow near the site of a deadly train derailment Thursday, May 14,... (Associated Press) 
 
 Philadelphia Mayor Michael Nutter, center right, hugs Lori Dee Patterson, a nearby resident, after she handed him a cup of coffee after he spoke at a news conference near the scene of a deadly train derailment,... (Associated Press) 
 
 As Philadelphia Mayor Michael Nutter, left, listens Amtrak CEO, Joseph Boardman discusses Tuesday's deadly train derailment Thursday, May 14, 2015, in Philadelphia. An Amtrak train headed to New York... (Associated Press) 
 
 Emergency personnel walk near the scene of a deadly train wreck, Wednesday, May 13, 2015, in Philadelphia. An Amtrak train headed to New York City derailed and crashed in Philadelphia on Tuesday night.... (Associated Press) 
 
 Sen. Pat Toomey, center white shirt, Philadelphia Mayor Michael Nutter, center tan shirt, and Sen. Robert Casey, right blue shirt, tour the scene of a deadly train wreck, Wednesday, May 13, 2015, in Philadelphia.... (Associated Press) 
 
 How that came to happen has emerged as the central question surrounding the derailment, which killed eight people and sent more than 200 to hospitals Tuesday night in the nation's deadliest train wreck in nearly six years. 
 
 In the minute or so before the crash, the train sped up from 70 mph until it reached more than 100 mph at a sharp bend where the maximum speed is supposed to be 50 mph, National Transportation Safety Board member Robert Sumwalt said. It's unclear, Sumwalt said, whether the speed was increased manually by engineer Brandon Bostian, who grew up obsessed with trains. 
 
 Investigators have found no problems with the track, signals or locomotive. Sumwalt said the train, on a route from Washington to New York City, was on time as it left the station in Philadelphia a few minutes before the crash. 
 
 Investigators want to know why the train was going so fast. But Bostian refused to talk to police on Wednesday, authorities said. On Thursday, Sumwalt said Bostian had agreed to be interviewed by the NTSB and the meeting will take place in the next few days. 
 
 Separately, the Philadelphia district attorney's office said it was investigating and will decide whether to bring charges. And an Amtrak dispatcher injured in the crash filed what's apparently the first lawsuit stemming from it, blaming Amtrak and seeking at least $150,000 in damages, his lawyer said. 
 
 Amtrak, in a statement posted online by CEO Joseph Boardman, called the derailment "a terrible tragedy" and said it was cooperating fully with the NTSB and was responding with every resource it has available. 
 
 "Amtrak takes full responsibility and deeply apologizes for our role in this tragic event," it said. 
 
 Bostian's lawyer, Robert Goggin, told ABC News that his client suffered a concussion in the wreck, needed 15 staples in his head and has "absolutely no recollection" of the crash. Goggin also said Bostian, who lives in New York, had not been using his cellphone, drinking or using drugs. 
 
 As the death toll climbed on Thursday with the discovery of what was believed to be the last body in one of the mangled railcars, Mayor Michael Nutter again appeared to cast blame on Bostian, questioning why the train was going so fast. 
 
 "I don't think that any commonsense, rational person would think that it was OK to travel at that level of speed knowing that there was a pretty significant restriction on how fast you could go through that turn," Nutter said. 
 
 Officials believe they have accounted for all 243 passengers and crew members thought to have been aboard, Nutter said. Forty-three remained hospitalized Thursday, he said. 
 
 Amtrak, meanwhile, said limited train service between Philadelphia and New York should resume on Monday, with full service by Tuesday. Amtrak carries 11.6 million passengers a year along the Northeast Corridor, which runs between Washington and Boston. 
 
 Bostian was obsessed with trains while growing up, talked about them constantly and wanted to be an engineer or a conductor, friends said. 
 
 "He would go on vacation and bring back subway maps," said Stefanie McGee, a friend from Tennessee. "He would go places with his family, and he would talk about the trains instead of the places." 
 
 Bostian graduated from the University of Missouri-Columbia with a bachelor's in business administration and management in 2006. He became an Amtrak engineer in 2010, four years after landing a job as a conductor, according to his LinkedIn profile. 
 
 Old friends and college classmates described him in glowing terms. 
 
 "I have nothing but good things to say about Brandon," said Will Gust, who belonged to the Acacia fraternity with Bostian in college. "He is a very conscientious person, one of the most upstanding individuals that I know, just a really good quality person." 
 
 McGee, the friend who is now city clerk in Bostian's hometown of Bartlett, a suburb of Memphis, said he "talked about trains constantly" while growing up and always wanted to be an engineer or a conductor. 
 
 Bostian met up with college friends a few years ago in New York and told them he was working on trains. 
 
 "Oh, yeah, he loved his job," said Justin Scott, another fraternity member with Bostian. 
 
 On an online forum for train enthusiasts called trainorders.com, a user who signed at least two posts "Brandon Bostian" or simply "Brandon" commented on a wide range of industry issues, including safety. A couple of posts under the handle "bwb6df" lamented that railroads hadn't been fast enough to adopt positive train control, GPS-guided technology that can prevent trains from going over the speed limit. 
 
 "They have had nearly a hundred years of opportunity to implement SOME sort of system to mitigate human error, but with a few notable exceptions have failed to do so," the writer posted in 2011. The same user said in 2012: "It shouldn't take an act of Congress to get industry to adopt common-sense safety systems on their own." 
 
 It's unclear whether the author of the posts was Bostian. In a message posted Wednesday, the site's administrator refused to release any information, citing privacy reasons. 
 
 Amtrak has equipped most of its heavily used Northeast Corridor with positive train control, but it was not in operation along the section where the accident took place because it was still being tested, said Boardman, the CEO. 
 
 However, Boardman vowed on Thursday that the technology will be in operation along the entire Northeast Corridor by the end of 2015, the deadline set by Congress. 
 
 On Tuesday, the job Bostian loved so much had him operating Amtrak's Train 188 from Washington to New York. 
 
 "He remembers coming into the curve," said Goggin, his attorney. "He remembers attempting to reduce speed, and thereafter he was knocked out." 
 
 But Goggin said the engineer doesn't recall anything out of the ordinary and doesn't remember applying the emergency brakes, as investigators say was done. He said Bostian's cellphone was off and stored in his bag before the accident, as required. 
 
 Goggin said that his client "cooperated fully" with police and told them "everything that he knew," immediately consenting to a blood test and surrendering his cellphone. 
 
 Within hours of the wreck, Bostian's Facebook profile picture was changed to a black rectangle. 
 
 ___ 
 
 Kunzelman reported from Baton Rouge, Louisiana. Associated Press writers Heather Hollingsworth in Kansas City, Missouri, Adrian Sainz in Memphis, Tennessee, and Jennifer Peltz in New York contributed to this story. ||||| Gildersleeve family from left to right: Ryan, 16, Marc, 13, wife Danna and Bob. 
 
 Missing dad Bob Gildersleeve, Jr. died in Tuesday's fatal Amtrak wreck, his company confirmed Thursday, two days after the Amtrak train he boarded in Baltimore speeded around a curve in Philadelphia and derailed. 
 
 A cadaver dog led investigators to Gildersleeve's remains as workers were moving the wreckage from the crash site to a secure location in Delaware. His body was found in the "large amount of wreckage" of the first passenger car, fire officials said, raising the death toll to eight. 
 
 Gildersleeve's story went viral after his 13-year-old son Marc, who'd traveled to Philly with his family, held up a sign with a picture and information about his father, pleading for help in finding his dad. 
 
 The 45-year-old vice president of corporate accounts for Ecolab was married with two children, age 13 and 16. 
 
 "We are deeply saddened by the loss of our friend and colleague," Ecolab CEO Doug Baker said in a statement. 
 
 On Wednesday afternoon, Gildersleeve’s family took to the streets of Philadelphia to spread the word about his disappearance. 
 
 “How, in this day and age, can we allow a train to go out of control at 106 miles an hour?” asked Bob Gildersleeve Sr., the victim's father. 
 
 His wife Danna said in a statement Thursday that her husband had been "my best friend for 29 years." The two celebrated their 18th wedding anniversary on Mother's Day. 
 
 "He is an remarkable Dad to our daughter Ryan and son Marc. He is a loving son, brother and is definitely the 'fun' Uncle to his nieces and nephews. He is funny and sarcastic and lights up any room with his presence, humor and enthusiasm. He has been a dedicated employee and friend to his Ecolab family for over two decades. Our hearts are broken and we can't imagine a life without him," Danna said. 
 
 Gildersleeve dropped his son off at lacrosse practice Tuesday and boarded the train instead of flying to New York, which he did more often. He was among the 8 dead and more than 200 injured in the crash. 
 
 "He was in the first car," Gildersleeve Sr. said late Wednesday night. "It's turned inside out. They found his phone. His phone, they found. But they can't find him or his belongings." ||||| Skip in Skip x Embed x Share CLOSE Amtrak Train 188 accelerated from 65 miles per hour to more than 100 in the last minute of its ill-fated journey. 
 
 Investigators work near the wreckage of Amtrak Northeast Regional Train 188 that derailed Tuesday night in Philadelphia. (Photo: Win McNamee, Getty Images) 
 
 The Amtrak train that derailed and killed at least eight people sped up for about a minute before derailing at a curve in Northeast Philadelphia, the National Transportation Safety Board announced Thursday. 
 
 The engineer, Brandon Bostian, has agreed to be interviewed by NTSB investigators in the next few days, board member Robert Sumwalt said at a news briefing. Bostian, 32, of Queens, suffered a concussion and "has absolutely no recollection whatsoever of the events" Tuesday night, his lawyer said in a television interview. 
 
 In the minute or so before the crash, the train sped up from 70 mph until it reached more than 100 mph at a sharp bend where the maximum speed is supposed to be 50 mph, Sumwalt said. It's unclear, Sumwalt said, whether the speed was increased manually by Bostian. 
 
 Investigators do not know why the Washington-to-New York train accelerated heading to the curve, not long after leaving Philadelphia's 30th Street Station on time, Sumwalt said. Bostian applied the emergency brakes seconds before the derailment, slowing the train to 102 mph. 
 
 A camera on the front of the new Siemens "Cities Sprinter" locomotive recorded the speed. 
 
 Inspection records revealed nothing wrong with the track, signals or the train, he added. 
 
 Amtrak announced last night that its rail service north of New York City has been restored. Service between Washington and Philadelphia is running at modified levels, while all traffic between New York City and Philadelphia remains suspended. 
 
 Thursday morning, recovery teams found an eighth body in the twisted wreckage of the passenger car directly behind the derailed engine, Philadelphia Fire Commissioner Derrick Sawyer said. 
 
 The commissioner told reporters that cadaver dogs were recalled to the area early Thursday to do one more search of the crash site. 
 
 He said the dogs were directed to the front passenger car, which was especially twisted and badly damaged, and indicated that a body was inside. He said the teams used hydraulic tools to reach the victim. 
 
 He was identified as Bob Gildersleeve, Jr., 45, a vice president for Ecolab of St. Paul, Minn. "We are deeply saddened by the loss of our friend and colleague," Ecolab CEO Doug Baker said in a statement. 
 
 Even before the discovery of the latest fatality, the crash was already the deadliest U.S. train accident in nearly seven years. 
 
 More than 200 people were injured when Amtrak Train 188 jumped the track in the city's Frankford neighborhood. Officials said that 11 people remained hospitalized Thursday, six in critical condition, but that all are expected to recover. 
 
 Philadelphia Mayor Michael Nutter reported Thursday that all 243 people who were believed to be on the train at the time have been accounted for. 
 
 The engineer's lawyer, Robert Goggin, said his client suffered a concussion and cannot remember what happened when the train jumped the tracks. Bostian has 15 staples in his head, stitches in one leg and his other leg is immobilized, he said. 
 
 "He remembers coming into the curve. He remembers attempting to reduce speed and thereafter, he was knocked out," Goggin told ABC's Nightline on Wednesday. 
 
 Bostian, he said, "has absolutely no recollection of the incident or anything unusual" and "no explanation" for the crash. He only recalls getting thrown around, coming to, finding his bag and his cellphone, and dialing 911, Goggin said. 
 
 Bostian told him that, as required, his cellphone was off and stashed in his personal bag before the accident. He voluntarily surrendered the phone to investigators. 
 
 Goggin said Bostian was "very distraught" to learn of the loss of life in the accident. 
 
 The lawyer said his client is cooperating with authorities and has turned over a blood sample. He also said Bostian told him he had no significant health issues before the crash and was not on any medications. 
 
 (Photo: LinkedIn.com) 
 
 According to his LinkedIn profile, Bostian has worked at Amtrak since 2006, first as a passenger conductor for four years and an engineer for almost five years. 
 
 Skip in Skip x Embed x Share CLOSE While Amtrak engineer Brandon Bostian has submitted a blood sample to investigators, he hasn't yet been formally interviewed by them. At least seven people were killed when the train derailed in Philadelphia. VPC 
 
 Nutter, reacting to word of the train's speed, said, "That's just insanity.'' 
 
 Nutter said he nevertheless didn't want to prejudge. "We know what happened. We don't know why." 
 
 The train's speed was captured on the recovered "black box" that records data on the operation of the train. 
 
 One safety measure that might have prevented the accident was not in operation along that stretch of track. The system is called the positive train control (PTC), which, according to Amtrak, is designed to prevent the collision of two trains, derailments caused by excessive speed and some human errors such as misaligned tracks during switching. 
 
 The system, which Amtrak in 2012 called "the most important rail safety advancement of our time" is mandated for all U.S. commuter lines by the end of the year, but had not been installed in the fatal section of the Philadelphia track. 
 
 "Had such a system been installed in this section of track, this accident would not have occurred," said Sumwalt. 
 
 Among the dead: 
 
 •Jim Gaines, a 48-year-old Associated Press video software architect, the news agency said. Gaines had attended meetings in Washington and was returning home to Plainsboro, N.J.His death was confirmed by his wife, Jacqueline. 
 
 •U.S. Naval Academy midshipman, Justin Zemser, 21, of Queens, N.Y., his mother told NBC4 New York. The school, which declined to release the name until all of his relatives were notified, did say that the victim was on leave and on his way home. 
 
 •Abid Gilani, a senior vice president at Wells Fargo, according to a company spokesperson in New York. 
 
 •Rachel Jacobs, the chief executive of a small tech company in Philadelphia, her family said Wednesday. She was the CEO of an online education consulting firm ,ApprenNet, and commuted from her home in New York City to her work in Philadelphia. She leaves behind her husband and 2-year-old son. 
 
 Contributing: Associated Press 
 
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– The Amtrak train in Tuesday night's deadly crash was going the speed limit until just before the derailment, when it mysteriously sped up when it should have slowed down, according to National Transportation Safety Board investigators. NTSB member Robert Sumwalt says that in the space of around a minute, the train's speed jumped from 70mph to 102mph, the Philadelphia Inquirer reports. Sumwalt says it's not clear whether engineer Brandon Bostian—who was concussed and has "no explanation" for the derailment—accelerated manually. Sumwalt says inspection records haven't revealed any problems with the track, signals, or the Siemens "Cities Sprinter" locomotive itself, reports USA Today. Bostian has told investigators he has no memory of the crash or of engaging the emergency brake, but Sumwalt says he did so seconds before the derailment, CNN reports. He says the engineer, who's recovering from multiple injuries, has agreed to be interviewed by the NTSB and will be allowed to have a lawyer present. The "positive train control" system that could have prevented the crash was just months away from becoming a reality in the Northeast Corridor, reports the New York Times. John Boehner called a question about funding cuts contributing to the crash "stupid" yesterday, but funding problems did contribute to the delay, the Times reports. The train—and the tracks—were already equipped with the system, but it took four years to buy the rights to airwaves to switch it on. An eighth victim was found by a cadaver dog yesterday. Like many other victims, Ecolab exec Bob Gildersleeve, 45, was on his way home to his family. When he didn't make it home on Tuesday, his wife and two teenagers traveled to Philadelphia to search hospitals for him, NBC Philadelphia reports. Though there are still many questions surrounding the crash—especially the increase in speed—Amtrak says it takes full responsibility for it, the AP reports. "With truly heavy hearts, we mourn those who died. Their loss leaves holes in the lives of their families and communities," CEO Joseph Boardman said in a statement. "Amtrak takes full responsibility and deeply apologizes for our role in this tragic event." Amtrak says full service between New York and Philadelphia should resume early next week.