Transcript for North Korea's ballistic missile test explodes seconds after blastoff

Who had turned to overseas tonight and the other big story were fall we North Korea's show of force failing in spectacular fashion. Tonight some asking if US hackers disrupted their missile tests that missile exploding seconds after launch with the world watching. Vice president Mike Pence a ride in South Korea just hours later called the test a publication. But US carrier group making its way to the Korean Peninsula president trump make initial force of his own. The president's national security advisor warning the US will take action if necessary. He's in North Korean nuclear tests still works it BC's chief global correspondent Martha Raddatz console tonight. US commanders say the ballistic missile a medium range missile blew up almost immediately after launch. Failed ballistic missile test came as vice president pence was on his way to sold after landing the vice president responding before US forces. This morning's provocation. From the north is just the latest reminder of the risks each one of you face. Every day. And tonight that intriguing question could a US cyber attack and brought down the North Korean missile. Something a former British cabinet ministers spoke about today. As a very strong a belief that the Americans through cyber methods. Have been successful on several occasions in interrupting. These sort of tests and making them fail. But no proof and no comment about those reports tonight from the White House and but today president trumps national security advisor why. Why lieutenant general HR McMaster told me he's confidence in president trump strategy for dealing with North Korea. That this problem is coming to a head and so it's time for us to undertake all actions weak and short of the military option to try to resolve this peacefully. That problem includes the looming threat of North Korea's sixth nuclear tests and those new missiles displayed over the weekend. The concern North Korea is getting closer to being able to reach the continental United States with of this soap. But if North Korea pulls the trigger this could be target number one. Posts on air base just 48 miles from North Korea. What we do here specifically as we are training day and day out to be. By tonight ready as we say. F sixteens on constant patrol anti missile batteries primed and ready from. We got an exclusive tour major Shawn Walsh an F sixteen pilot upper disguised training at least three times a week. Within miles of the North Korean border. And look underneath here my vision goggles you can see lights as far as you can see it it almost looks like daylight. And then you look at the other side here cockpit and it is his darkness. While the failed missile launch was humiliating for Kim Jong-un US officials have no doubt he will try again. To perfect a long range missile with a nuclear warhead. Capable of reaching the United States time. And our troops sandy our flight tonight ready all right Martha Raddatz from Seoul South Korea for more on this still let's bring in Steve guinier what of our ABC news console since Steve two questions first was the missile failure a complete waste of resources. And you think can joke when will still try that nuclear test. It wasn't a complete waste time because what they're gonna do is revered figure out what went wrong they're gonna go back test and tested until they get it right. But now all the attention focuses to this potential underground nuclear test. And how that gets conducted so intelligence analysts have been watching the underground mountain complex very closely. To determine if that's ready to go they've declared it primed and ready to go so it could be a test any minute. And even though the administration today said that the north Koreans would face serious consequences if they were to do so. That's Stevie gave first tonight Steve thanks so much.

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