North Korea Claims 5th Successful Nuclear Test

The test explosion, conducted after President Obama concluded his trip to Asia, may lead to more sanctions against the Communist state.
1:36 | 09/09/16

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Transcript for North Korea Claims 5th Successful Nuclear Test
More is coming up. Right to that breaking news. Successful nuclear tests by North Korea. They claimed it overnight. South Korea confirms and president Obama briefed on his way home from the region and Martha Raddatz tracking it all from Washington. This is just the latest in a series of provocations from North Korea. Reporter: It certainly is, George. This overnight test believed to be the big et yet resulting in the most powerful explosive yield ever produced in north Korea and causing a magnitude 5 tremor. The announcement came on state TV, the anchor in traditional dress gleefully announcing the test as North Korea celebrates the 68th year of its government. What is alarming about the test is that it shows steady progress. The first test in 2006 yielded the equivalent of only about 1 kiloton of tnt. This one is estimated at 10 kilotons and the same time north Korea continues to test ballistic missiles with an increasing range. They say their goal is to miniaturize a nuclear warhead and place it on a missile capable of reaching the U.S. They don't have that capability yet, George, but clearly that is the direction they are heading. That is a huge danger. Instant reaction from the U.S. And our rivals in the region. Reporter: Certainly, the president as you said was briefed on air force one. He had just concluded that Asia tour this morning secretary of state John Kerry and his Russian counterpart expressing deep concern, but, George, there have been increasing sanctions and condemnation and it has not stopped North Korea. So little we can do about them. Martha Raddatz, thanks very

This transcript has been automatically generated and may not be 100% accurate.

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