US has ~50 planes still in the air, 6 unaccounted for .. but 4 believed to be the ones crashed. 2 in the Trade Towers in NYC, 1 in Pentagon in Arlingtron, VA, and the last just found in Somerset, PA. That leaves 2 unaccounted for.
I'm an 8 hour drive from NYC and everything is closed here too, school, airports, any gov't buildings.
Closings in Philly and Pittsburgh also.