Chat with us in Facebook Messenger. Find out what's happening in the world as it unfolds.

People watch a TV news program showing North Korea's announcement, at the Seoul Railway Station in Seoul, South Korea, Wednesday, Jan. 6, 2016. North Korea said Wednesday it had conducted a hydrogen bomb test, a defiant and surprising move that, if confirmed, would put Pyongyang a big step closer toward improving its still-limited nuclear arsenal. The letters read " Will not use nuclear weapon if autonomy secured."  (AP Photo/Ahn Young-joon)
People watch a TV news program showing North Korea's announcement, at the Seoul Railway Station in Seoul, South Korea, Wednesday, Jan. 6, 2016. North Korea said Wednesday it had conducted a hydrogen bomb test, a defiant and surprising move that, if confirmed, would put Pyongyang a big step closer toward improving its still-limited nuclear arsenal. The letters read " Will not use nuclear weapon if autonomy secured."  (AP Photo/Ahn Young-joon)

    JUST WATCHED

    John Kirby: W.H. wants to hold N. Korea 'accountable'

MUST WATCH

John Kirby: W.H. wants to hold N. Korea 'accountable'

John Kirby from the State Department tells CNN's Jake Tapper that the Obama administration vows to hold North Korea 'accountable.'

John Kirby: W.H. wants to hold N. Korea 'accountable'

John Kirby from the State Department tells CNN's Jake Tapper that the Obama administration vows to hold North Korea 'accountable.'