Staff Sgt. Benjamin Ayivorh, a Thunderbird 7 dedicated crew chief, walks to his F-16 Fighting Falcon to prepare it for engine runs April 23, 2013, at Nellis Air Force Base, Nev. Ayivorh said he joined the Thunderbirds team for a chance to represent the U.S. Air Force. (U.S. Air Force photo/Tech. Sgt. Manuel J. Martinez)