Airman 1st Class Caleb Burker, 28th Aircraft Maintenance Squadron weapons load crew member, loads luggage into a commercial aircraft prior to leaving for Green Flag, a combat training exercise at Nellis Air Force Base, Nev., on the flightline at Ellsworth AFB, S.D., May 10, 2012. For some of the Airmen participating in the exercise, Green Flag will be the final exercise before actually deploying to Southwest Asia later this year. (U.S. Air Force photo by Airman 1st Class Kate Thornton/Released)