A B-1B Lancer assigned to the 37th Bomb Squadron, Ellsworth Air Force Base, S.D., launches during a Red Flag 15-2 night sortie at Nellis AFB, Nev., March 10, 2015. Red Flag is a realistic combat exercise involving U.S. and allied air forces conducting training operations on the 15,000 square mile Nevada Test and Training Range during day and night operations. (U.S. Air Force photo by Staff Sgt. Siuta B. Ika)