My guess is that President Trump is really fed up with Kim and wants to get rid of him. Americans failed to topple Assad in Syria. But it seems it is now much easier to convince the surrounding countries near North Korea and the rest of the world that it would be best to get rid of Kim. But as far as I know Russia is against it because of a risk of millions of lives that could be lost. But USA thinks Kim must be stopped now, otherwise in a very short time Kim will become even more dangerous, due to the nuclear weapons he is developing. So I think Trump is going to attack North Korea, because he has sent there three aircraft carriers and a atomic submarine and a large number of other military vessels. Why this military build up around North Korea, if not for war? And I think USA has prepared a lot of nukes for North Korea if necessary. And of course North Korea would try to retaliate. They could send a hydrogen bomb as they claim to US mainland or Japan or South Korea. But as far as I know if they aim USA, their ICBMs do not have a presice guiding system yеt. Probably they could not get a direct hit on any major city.
Interesting that USA is not seeking an approval from UN to stop Kim, but he went himself to Asia for a round trip to seek support and approval. So North Korea is finding itself against an other kind of coalition of nations. And this would be the beast in Revelation 13.
I think we are very near an attack on North Korea.