Raptor's first tests
Tech. Sgt. Glenn Lesher performs preflight launch checks on F-22 Raptor 11. The "OT" on the tail designates the Raptor as an operational test vehicle. An April 29, 2004, mission tested two Raptors for the first time in the sky over Edwards Air Force Base, Calif. Sergeant Lesher is a 31st Test and Evaluation Squadron crew chief. (U.S. Air Force photo by Derk Blanset)