Sen John McCain tells Candy Crowley it's only "a matter of time" until North Korea has nuclear capability if not already.
"I don't think we know for sure. There have been other miscalculations by our intelligence agency, but have no doubt that they're on the path to achieving that capability. Look what they've achieved over the last 10-15 years, and also exported including to other countries, including Iran. And so they are a danger. So I think it's a matter of time before they have that capability. Whether they do or not right now, I don't - it's not clear."