This is terrible, horrible. I can't believe this has happened. They've shut down the airport here in Tucson, AZ. Even some of my classes have been cancelled. All of those people on the planes, in the buildings. I pray for them and their families. That plane that went down in Pennsylvania, I wonder if the pilot struggled so the plane would crash in the area outside of Pittsburg. Instead of hitting the more populated areas. God I can only imagine... Prayers for peace, and that people see just what terrible things have gone on today.