U.S. Air Force Senior Airman Bryan Burke, 104th Fighter Wing crew chief, Massachusetts Air National Guard, conducts a post flight inspection on a F-15E Strike Eagle during Red Flag 12-2 Jan. 24, 2012, at Nellis Air Force Base, Nev. Red Flag is a realistic combat training exercise involving the air forces of the United States and its allies. The exercise includes units from Nevada, Colorado, South Dakota, Louisiana, Utah, California, Massachusetts, Oklahoma, Republic of Korea and Kingdom of Saudi Arabia.