I was living in DC area at the time... after the pentagon was hit the city shutdown, all traffic was diverted out of the city that day.
For the next week, the military was all over the city controlling traffic, I remember seeing Hummers everywhere, on sidewalks, in the middle of roads. My 20 minute commute to the university took 1 and a half hours that whole week. You guys remember how everyone was on edge, no one had any idea what the hell was going on!
I remember I also traveled exactly one week after 9/11 from DC to Florida. Right when the crew shut the doors to the plane, I remember the captain came out of the cock pit and addressed the passengers, he said something to the effect of "I know that everyone is very concerned about what has been happening, but I want to assure everyone that today you are all riding on the safest aircraft in America, we have been taking new security precautions and this is the first flight to see these new measures implemented" - everyone applauded him, and we were on our way.
Was very sad the whole thing... Really can't blame Americans for hating Arabs/Muslims after this!