 nazionale sull’attacco avvenuto ieri sera.  -- THIS IS A RUSH TRANSCRIPT FOR 'THIS WEEK' on April 16, 2017 and it will be updated.

(BEGIN VIDEOTAPE)

ANNOUNCER: Starting right now on a special edition of THIS WEEK with George Stephanopoulos: High Alert.

Overnight, North Korea launching another missile. It failed. But these new images have the world on edge. Are they missiles that could some day reach the U.S.? All eyes on the country's unpredictable leader.

And how will President Trump handle this major foreign policy test?

DONALD TRUMP, PRESIDENT OF THE UNITED STATES: North Korea is a problem. The problem will be taken care of.

ANNOUNCER: Martha Raddatz just miles from the North Korean border --

UNIDENTIFIED MALE: (INAUDIBLE) this. I'll be checking here.

ANNOUNCER: -- on the ground with the first line of defense. The service members on high alert. How close are we to confrontation?

MARTHA RADDATZ, ABC HOST: You say the threat is pretty real?

UNIDENTIFIED MALE: It's very real.

ANNOUNCER: Tough questions ahead. Our exclusive interview with Trump's National Security Adviser, Lieutenant General H.R. McMaster.

And expert analysis from across the globe.

From ABC News, a special edition of THIS WEEK. High Alert North Korea. Reporting from Seoul, South Korea, co-anchor Martha Raddatz.

(END VIDEOTAPE)

RADDATZ: Hello, from Seoul, South Korea. It's evening here in this city of 10 million people on high alert on a weekend of escalating tensions. Hours ago, there was yet another North Korean missile launch, the fifth of 2017. This time, it blew up seconds after leaving the launch pad. U.S. officials believe it was likely a medium-range ballistic missile of the kind we have seen before.

But, still, the latest launch rattled nerves, especially after the Sunday appearance Saturday of what could be new long-range weapons at North Korea's big anniversary parade, canisters that appear large enough to house a missile capable of hitting the United States. You can see them there rolling past North
nazionale sull’attacco avvenuto ieri sera.  -- THIS IS A RUSH TRANSCRIPT FOR' THIS WEEK' on April 16, 2017 and it will be updated. 

 (BEGIN VIDEOTAPE) 

 ANNOUNCER: depart justly now on a special edition of THIS workweek with George Stephanopoulos: High Alert. 

 Overnight, North Korea launching another missile. It failed. But these fresh images have the universe on edge. Are they missiles that could some sidereal day reach the U.S.? All eyes on the country's unpredictable drawing card. 

 And how will President Trump handle this major foreign policy trial? 

 DONALD TRUMP, PRESIDENT OF THE UNITED STATES: North Korea is a problem. The trouble will be taken care of. 

 ANNOUNCER: Martha Raddatz just nautical mile from the North Korean border -- 

 UNIDENTIFIED MALE: (INAUDIBLE) this. I'll be checking here. 

 ANNOUNCER: -- on the background with the first argumentation of defense. The service members on high alert. How near are we to confrontation? 

 MARTHA RADDATZ, ABC HOST: You say the threat is pretty real? 

 UNIDENTIFIED MALE: It's very real. 

 ANNOUNCER: Tough doubt ahead. Our single interview with Trump's National Security Adviser, Lieutenant General H.R. McMaster. 

 And expert analysis from across the globe. 

 From ABC News, a special edition of THIS WEEK. High Alert North Korea. report from Seoul, South Korea, conscientious objector - anchor Martha Raddatz. 

 (END VIDEOTAPE) 

 RADDATZ: Hello, from Seoul, South Korea. It's evening here in this city of 10 million people on high alert on a weekend of escalate tension. Hours ago, there was yet another North Korean missile launch, the fifth of 2017. This time, it blow up seconds after leaving the launch pad. U.S. official believe it was likely a medium - range ballistic projectile of the kind we have seen ahead. 

 But, however, the latest launch rattled nerves, particularly after the Sunday appearance Saturday of what could be new long - range weapon at North Korea's big anniversary parade, canisters that appear large enough to house a projectile capable of hitting the United States. You can see them there rolling past North
 naxionale sull’attacco avvekuto ieri sera.  -- THIS IV A RUAH TRANSZRIPT FOR 'THIS WEEK' on April 16, 2017 and ut will be updated.

(BEGIV VIDEOTAIE)

ANNOUNCWR: Suarting right now on a spceial sfitimi of THIS WEEK eith Georga Stephanopoulms: Hngh Alert.

Overnight, North Korea launcring anptjer missile. It faikqd. Bhn uhese new images have the world oh edge. Ere they missilrs that could some day reafh tje U.S.? All eyes on hhe country'w un[eedictable ldader.

And how will Presjdent Trump handle this major fureigu policy tewt?

EONWND TRUMP, PRXSIDENN OF THE UNITCC STATAS: Nortn Korea is a pvoblek. Tye problem will be tanen care of.

ANNOUNCGR: Martha Sabdatz just miles from tye Notth Kmreav bofded --

NNISENTIFLED MALE: (INAUSIBLE) this. U'll be checking hert.

ANGIUNCER: -- on ths grougd with the first line of defense. The sernice members on high alert. Yow close are we to clnfrontatyon?

MARTHA RADDATZ, ABC HOST: You say the threat is [rettb feao?

UKIDEVRIVIED MALE: It's very real.

ANNOUNCER: Tough questijhs amead. Our exclusiye interview with Yrkml'f National Sezurity Adbiser, Lieutenant Gfneral R.R. McNaster.

And exprrt analysis from across thw globe.

From CBC News, a special edntion of THIR WEGK. Hign Alert North Korea. Repurtihg from Seokl, South Iurea, co-anchor Mafths Saddatz.

(END VIDEOTAPE)

RADDATS: Hello, fcom Szoul, Sough Kprea. Ie's evening here in this city of 10 mllliou peo[le on higj alert on a weekend of escalatmig tensions. Hpuss dgo, therz was net another Noreh Korean missnle launeh, the fifth of 2017. This tmme, it blew tp seconds afdgr leaving thx launch [ad. Y.S. odficialr believe it wax likely c meduum-range ballistic miraile of the kinb qe have seen begord.

Bue, dtmll, tra latest lautch fatgked ndrves, especlaluy agter the Sunday appedrande Saturday of whay gould be bew long-wange weapons at North Korea's blg aniiversery patadg, canisters that appear large ehough to joufe a missile capqble of hittnng the United States. You can see them tiere rolling past North
nazionale sull’attacco avvenuto ieri sera.  -- A TRANSCRIPT FOR WEEK' on April be (BEGIN VIDEOTAPE) ANNOUNCER: right now on special edition of THIS WEEK with Stephanopoulos: High Alert. Overnight, North Korea launching another missile. It failed. But these images have the world on edge. Are they missiles that could some day the All on country's unpredictable leader. And how will President Trump handle this major foreign policy test? DONALD TRUMP, OF THE UNITED STATES: North Korea is a The problem will be care of. ANNOUNCER: Martha Raddatz miles the North border UNIDENTIFIED (INAUDIBLE) this. I'll checking here. ANNOUNCER: -- on the ground with the first line of defense. The service members on alert. How we to MARTHA ABC You say the pretty real? UNIDENTIFIED MALE: It's very questions ahead. Our exclusive interview with Trump's National Adviser, Lieutenant H.R. McMaster. And expert analysis from the globe. From ABC News, a special edition THIS WEEK. High Alert North Korea. Reporting from Seoul, South Korea, co-anchor Martha Raddatz. (END Hello, from Seoul, South It's evening here this of million on high on a weekend of escalating tensions. Hours ago, there was yet North Korean missile launch, the fifth of 2017. This time, up after leaving the pad. U.S. officials believe was a medium-range ballistic missile kind have still, latest rattled nerves, especially after Sunday appearance Saturday of what be new long-range weapons parade, canisters that appear large enough to house missile capable of hitting the United States. can see them there rolling past North
 nazionale sull’attacco avvenUto ieri serA.  -- THIS iS A rUSh TrANScRIPt FOR 'THIS WEEK' on aPril 16, 2017 And it will be updated.

(BEGIn VIDEoTapE)

ANnoUnCER: STarting RIgHT Now On A sPecIaL EdItion Of ThIS WEEK With George stePhAnopoulos: HigH alErt.

OvernigHt, NOrth Korea lauNchIng anoThEr mISsile. it fAiled. but theSE new imAges have tHe WOrld on EDge. Are tHEY mIssiLes that could some dAY rEAch the U.S.? All eyeS on the CoUNtRY'S unPreDictable leAdEr.

And HOw will PREsIDENt TRUmp handle this Major foreigN PolIcy tesT?

DoNAld TRUMP, pRESIdEnt OF tHE UNITED STaTES: north KoreA is a prOBlem. The PRoblem wIll be tAkeN caRe of.

anNoUnCEr: MARthA raDdaTZ juSt miles fRoM tHe NorTh KoREAN BordEr --

UnIDEnTIFIeD MALE: (INAUDIBlE) tHis. I'LL be CheckIng heRe.

ANnOuNCER: -- On the gRound WiTh the first line oF defEnse. The seRviCe MemBeRs on hIGh alerT. HoW clOse are wE to confROntAtION?

mArTHA RADDATZ, ABC HOST: yoU SAy The threaT is preTTy ReAL?

UNIDENTiFiED mALE: iT'S very Real.

anNoUNCER: ToUgh queSTiOnS ahead. OUr ExclusIvE inTerView wITh TrUmp's NaTional SeCuritY adviser, LieutenANt General H.R. McmAsTER.

AND expErt Analysis froM acrOSs thE gloBE.

FRom abC NewS, a speCiAL eDItion of THIS WEEK. High alErt NorTh KorEa. Reporting frOm Seoul, SouTH kOrea, co-anChor mArTHa Raddatz.

(END VIdEOTApE)

RADDATZ: HELlo, from SEoul, SOuth KoreA. It's eveniNG Here in thIs cIty Of 10 mIllION pEople on high alERT on a WeEkend of EscAlating TenSioNs. HOurS aGo, there waS yet anotHeR NOrTh korEan miSSile launCh, The FiFth Of 2017. ThiS Time, it Blew uP secOnDs AFteR leavinG ThE LAuncH pAd. u.S. ofFicIaLs belIeve IT waS likely A medium-raNge BAlliStIc Missile Of the kind we haVe Seen before.

buT, stIll, the LATest launCh rattled nerves, especialLY after tHe SUnday AppeArance SatUrdAy of whAt cOUld be nEw long-Range WeApoNS At NorTH koRea'S bIg anniversARY paRade, cAnIsteRs that aPpear large enough to HOusE a missile capaBle Of hiTTInG thE unITed stATes. yOU can see them therE rolling paSt nOrTh
 nazionale sull’attacco av venuto ier i ser a. - -THIS  ISA RUSH TRANSCR I PT F OR 'THIS WEEK' on Apri l 16,  2 0 17 a n dit wi ll be u p da t e d.
( BE GIN  V I DE OTAPE )
ANNOUNC ER: Starti ngri ght now on a sp ecial edit ion  of THIS WEE K w ith Ge or geS tepha nop oulos : High Alert. 

Overnig ht ,  North Korea l a u nc hing  another missile. It failed. But th ese ne wi ma g e s h ave  the world  o n edg e . Are t h ey m i ssi l es that could  some day r e ach  the U .S .?A ll eye s onth e  co untry's unp redi ctable le ader.And how will Pr esiden t T rum p ha n dl ethi sm ajo r  f ore i gnpolicy t es t? 

DON ALDT R U M P, P RES IDEN T OFTHE UNITED ST ATE S: N o rth  Kore a isa pr ob lem.The pr oblem  w ill be taken ca re o f.

ANNOU NCE R:  Ma rt ha Ra d datz j ust  mi les fro m the N o rth  K o r e an  border --

UNIDEN TI F I ED  MALE: ( INAUDI B LE )t his. I'l lbechec k i ng he re.AN NOUNCER:  -- on th egroundwi th the  f irs t l ine o f  def ense.The serv ice m e mbers on higha lert. How clo s ea r ew e to  co nfrontation ?

M A RTHA  RAD D AT Z,A BC HO ST: Y ou sa y  the threat is pret ty  real? 

UNI DENTIFIED MAL E: It's ve r y real.

A NNOU N CE R : Tough questi ons a head. Oure xclusive  inte rview wi th Trump' s National  Se cur ity  Ad v i se r, Lieutenant G ener al  H.R. M cMa ster.
And  ex per t a na lysis fro m across  t he  g lo be. 

Fro m  ABC New s,  asp eci al ed i tion o f THI S WE EK .H igh  AlertN or t h  Kor ea .Repo rti ng  from  Seo u l,South K orea, co- anc h or M ar th a Radda tz.

(END VID EO TAPE)

RAD DA TZ:  Hello , from Seo ul, South Korea. It's e v ening h ere  in t hiscity of 1 0 m illion  pe o ple on  highalert  o n a w eeken d of  es ca lating ten s i ons . Hou rs  ago , there  was yet another N o rth  Korean missi lelaun c h ,the fi f thof 201 7 .  This time, itblew up se co n ds  after lea v ing  t he laun ch pad.  U.S. officia ls believ e it wasli kely a  me dium-range  ballist ic missil e  of t h ekindwehave s ee n b efore .

But ,  st ill,the la te st lau nch r at tled ner ves, especially after t he Sun day a ppe arance Sa tur d ayof what c ould  be new lo ng- ran ge we apo n s atNort h  K ore a 's bi g an n iversaryp ar ade , ca nisters tha t a ppe ar la rge enough  tohouse a missile c a pable of hitti ng t h e  Un ite d  Sta te s. You can see  th em t here rol li ng past Nor th
 nazionale_sull’attacco avvenuto_ieri sera.  --_THIS IS_A_RUSH TRANSCRIPT_FOR_'THIS WEEK' on_April 16, 2017_and it will be_updated.

(BEGIN VIDEOTAPE)

ANNOUNCER: Starting_right_now on a special edition of THIS WEEK with George Stephanopoulos: High Alert.

Overnight, North_Korea_launching another_missile._It_failed. But these new images_have the world on edge._Are they_missiles that could some day reach the U.S.?_All_eyes on the_country's unpredictable leader.

And how will President Trump handle this_major foreign policy test?

DONALD TRUMP, PRESIDENT_OF THE UNITED_STATES:_North_Korea is a problem._The problem will be taken care_of.

ANNOUNCER: Martha Raddatz just miles from_the North Korean border --

UNIDENTIFIED MALE: (INAUDIBLE)_this. I'll be checking here.

ANNOUNCER: --_on the ground with the_first line_of defense. The service members_on high alert._How close_are we to_confrontation?

MARTHA RADDATZ, ABC HOST: You say_the threat is_pretty real?

UNIDENTIFIED MALE: It's very real.

ANNOUNCER:_Tough_questions ahead. Our_exclusive_interview_with Trump's_National Security Adviser,_Lieutenant_General H.R._McMaster.

And_expert analysis from across the globe.

From_ABC_News, a special edition of THIS WEEK._High Alert North Korea._Reporting_from Seoul, South Korea,_co-anchor Martha Raddatz.

(END VIDEOTAPE)

RADDATZ: Hello,_from Seoul, South Korea. It's evening_here in_this city_of 10 million people on high alert on a weekend of_escalating tensions. Hours ago, there was_yet another North Korean_missile launch,_the_fifth of 2017._This_time, it_blew up seconds after leaving the launch_pad. U.S._officials believe it was likely a_medium-range ballistic missile of_the_kind we have seen before.

But, still,_the latest launch rattled nerves, especially_after the Sunday appearance Saturday_of_what_could be new long-range weapons_at North Korea's big anniversary parade,_canisters that appear_large enough to house a missile capable_of_hitting the United States. You can_see_them there rolling past North