B-1b Lancer parked night
Two crew chiefs assigned to the 28th Aircraft Maintenance Squadron, Ellsworth Air Force Base, S.D., prep a B-1B Lancer for flight during Red Flag 15-2 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.