Oh, yeah. And I suspect that the military leaders of Korea (not the idiot in political control) are well aware of this. If Kim-Jung-on should actually declare war on the US, I'll bet the military would have him put somewhere SO fast.
It would be suicidal for north Korea to attack US or south korea plus their missiles can't reach us. The military base in Guam and Alaska should be worried but still a very huge mistake. oh and yeah our military Is #1 in the world
Are they trained? Not only does the U.S. constantly train and develop new cutting edge weapons technology we have been involved in a major war at least once a generation since declaring independence from Great Britain. I'd say we have a bit of experience.
Probably but with nukes it really doesnt matter how many you have. One bomb would wipe out our military installations on Guam and another could wipe out Honolulu and iradiated all of the Hawaiian islands. IF the manage to reach the west coast, BIG if, they could take out most of Los Angeles and irradiate the rest. Not that Hollywood would be a huge loss but.....
The answer to your question is simple: yes, the USA are ready for war. Always. And they will win. Another interesting question (and possibly the only relevant one) however is, how much damage can North Korea cause if they should decide to strike first. They would probably get to deal one blow only. It depends on the type of weapons they could use, and if they could in any way reach the USA unhindered. Don´t worry too much though: the US armed forces worry about this every day, and are well prepared.