This is just Putin trying to put the frighteners on the Americans, he is always making some kind of threat and never fulfills the threat so in the end the Americans are going to just take his actions as bluffing. I will be very surprised if he does attempt or even succeed in boming America.
No, that's American Main Stream Media, frightening Americans with Putin, all the while preparing Bill 2277, which will open op for US invasion of Russia, using the previously-mentioned "fright" as a pretext..