During or National crisis, when all air traffic was halted I noticed something really strange. I work in a plant that is right in the glide path of Reno, Tahoe International airport and got used to the computer monitor dancing around and the really loud noise of incoming jet planes, but when the noise stopped for those few days it was really erie. I'm happy to say, the noise and the shaking have returned and I feel much better knowing that as long as the noise continues and my monitor bounces around everything is OK.