CIA Director Mike Pompeo says North Korean leader Kim Jong Un won't be satisfied with simply staying in power.
White House spokeswoman calls Kim ‘mentally unfit’ though intel officials caution against writing him off as crazy.
CIA chief 'deeply worried' about threat from Pyongyang, risks of nuclear proliferation.
Analysts see a "clarity of purpose" to Kim Jong Un's actions, despite small margin for error.
Navy has also ordered an operational pause for up to two days following collision with a merchant ship near Singapore as it investigates what happened.
Pyongyang says Kim Jong Un will watch “foolish and stupid conduct” from Washington before making final decision; US defense chief says says it’s ‘game on if Pyongyang hits the US.
US president talks about 'severe' measures against Pyongyang but defense secretary says diplomacy still on the table.