Aircraft flight together in the Trainer Aircraft Parade during the 2010 Aviation Nation open house at Nellis Air Force Base, Nev., Nov. 13, 2010. The annual open house is an opportunity for the Las Vegas community to view aerial demonstrations and static displays of various military aircraft. The event also acts as the final air show of the year for the U.S. Air Force air demonstration squadron, the Thunderbirds. (U.S. Air Force photo by Airman 1st Class Matthew Lancaster/Released)