My hopes and dreams for a Fallout-esque world is ruined...
I actually think that a full-scale nuclear war with China is totally possible. It'll probably have to do with pandas.
The National Zoo refused to return one of their pandas to China when the lease was up a couple of years ago, and there was some heated diplomacy before they agreed to have the lease extended.
Pandas are serious business, and it would hardly be the silliest excuse for a war so far.