The weird thing I remember was just how beautiful a day weather wise it was. Just perfect weather, I thought how could something so terrible happen on such a beautiful day. I looked up in the blue sky to notice how clear it was, how unusually clear. Then I realized what was missing, contrail from the planes flying down the east coast. There weren't any. Not a plane in the sky. I live in a busy flyway area. We have an air force base (sent fighters up to defend the skies from the plane that went down in Pennsylvania) and a huge navy fighter base. And nothing was flying on the way home.