A B-1 Lancer from Ellsworth Air Force Base, S.D., takes off during Green Flag-West, Oct. 30, 2012, at Nellis Air Force Base, Nev. Green Flag is an unscripted battle exercise which provides units with training on a scale not available at or near their home stations. Green Flag-West replicates irregular warfare conditions. (U.S. Air Force photo by Senior Airman Daniel Hughes)