EXHAUST INSPECTION U.S. Air Force Staff Sgt. Tacota Lemuel inspects the exhaust of an F-16 Fighting Falcon aircraft during maintenance on Kelly Air Field, Texas, Nov. 5, 2010. Lemuel, a crew chief, is assigned to the Air Force Air Demonstration Squadron, the Thunderbirds. SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 570430-B-PWM36-294.jpg Photo Gallery