President Trump has revealed the toughest decision he's made so far.

FOX's Jon Decker has more from the White House:

President Trump discussing on SiriusXM the successful cruise missile bombing two weeks ago of a Syrian military airfield:

(President Trump) "But I'll tell you it's tough because you don't know that's going to happen. Is one going to go haywire and will end up in a city or end up in a town and kill a lot of people. So you don't know. But it was an important decision. Not an easy decision to make."

The President also discussing the ongoing tensions with North Korea, saying that "we have to be prepared for the worst," and declined to rule out military action.

Congress, meanwhile, is moving on a separate front to apply new sanctions against Pyongyang.

At the White House, Jon Decker, FOX News.