>>My understanding is that they can reach the USA but not with any degree of accuracy, but whats plus of minus 500 miles with an H bomb?
LOL. It’s funny how everyone thinks that one of these is some doomsday weapon. Plus or minus 5 miles is a solid miss for the fireball of an H-bomb. Now, targeting a large population center like LA and not caring which people you kill makes error less meaningful. But if you want to nuke the WH or Pearl Harbor or Wall Street or downtown San Francisco and you only have one shot, then accuracy matters.
China has hundreds of these (maybe more secretly) . Nothing to be alarmed about, just economy destroyed, radioactivity, mas destruction etc /sarcasm :