Its harder to do because their missiles have solid fuel so they do not need to be deployed on a launchpad and filled with liquid fuel before launch. They can be taken out and deployed in minutes. This leaves very little time for them to be spotted, targeted and destroyed.

planes and drones. Part of the problem is that we don't know where the missiles are, and that the ICBMs are movable. While they need specific types of roads and launching areas to work effectively, the point is they're not in silos.

but I assume we are more capable than any of us are aware. I have no doubt that we have been maintaining a close eye on the North Korean's assets, their locations and travel routes for missile transporters over the years. We're pretty good at that sort of thing, I believe.

I realize that the missiles are not in fixed positions, but launching four simultaneously will take some time to set up, and Kim seems to like watching such things in person.

Perhaps we could take care of more than one goal at the same time, if we're watchful enough and prepared enough. It would be very interesting to be a mouse in a corner where this sort of operation by the US is handled, I think. Very interesting indeed.

Most estimates suggest the U.S. has roughly 122 satellites dedicated to national security.

http://www.spaceref.com/news/viewnews.html?id=1622

information in NK for quite some time.

stays over the same point on the Earths surface as the planet rotates. These aren't the norm, but they're not uncommon either.

http://www.thedrive.com/the-war-zone/9315/this-is-how-america-keeps-watch-over-north-korea-from-the-sky
This Is How America Keeps Watch Over North Korea From The Sky
After more than a decade of nuclear and missile tests, the Pentagon has only stepped up its surveillance of the isolated country.
By Joseph Trevithick | April 14, 2017

https://www.space.com/36099-japan-launches-spy-satellite-igs-radar-5.html
Japanese Spy Satellite Launches to Watch North Korea
By Mike Wall, Space.com Senior Writer | March 16, 2017 09:30pm ET

We rarely know all the facts about our capabilities.

air strike hell, let's nuke the entire site from orbit--it's the only way to be sure!

Really. Nobody has gone that far, since what goes up will eventually come down.