The Pentagon has drafted a revised doctrine for the use of nuclear weapons that envisions commanders requesting presidential approval to use them to preempt an attack by a nation or a terrorist group using weapons of mass destruction. The draft also includes the option of using nuclear arms to destroy known enemy stockpiles of nuclear, biological or chemical weapons.

Um... Who do you "nuke" when a couple people might try to bomb you? Do we roll dice? Sending nukes after terrorists is sort of like blowing up an apartment building to kill a mouse.
The Pre-emptive bit is troublesome... I wonder who's job it'll be to figure out thay=t "They" are after us.

Pentagon Revises Nuclear Strike Plan