Exercise Green Flag
A B-1B Lancer from Ellsworth Air Force Base, S.D., approaches a Travis AFB, Calif., KC-10 Extender during an aerial refueling training mission near Edwards AFB, Calif., Nov. 1, 2017. The B-1B was part of exercise Green Flag, which is an advanced, realistic and relevant air-to-surface training exercise that prepares joint and coalition warfighters to meet combatant commanders requirements across air, space and cyberspace. (U.S. Air Force photo by Staff Sgt. Nicole Leidholm)