You know what I'd do if I were you? Get your whole family together, go back down in that shelter you built for Y2K and stay there. Someone may or may be along in a possibly reasonable amount of time to let you know it's all over (depending on if anybody remembers to drop by).
Sheesh, what if, what if, what if? What if the terrorists used the Goodyear blimp to attack a football game?!? Oh wait that's been done hasn't it? OMG, Hollywood was giving terrorists ideas 30 years ago!!