A F-86 Sabre,P-38 Lightning , F-4 Phantom and A-10 Thunderbolt (clockwise) break over Nellis Air Force Base, Nev., for the Air Combat Command heritage flight during the 2009 Aviation Nation open house Nov. 13, 2009. The open house is an opportunity for the Las Vegas community to view aerial demonstrations and static displays of various aircraft from the military. The open house also acts as the final air show of the year for the U.S. Air Force Aerial Demonstration Squadron Thunderbirds. (U.S. Air Force photo/Master Sgt. Kevin J. Gruenwald)