Col. James Katrenak, 28th Maintenance Group commander, wishes deploying Airmen good luck as they prepare to board a plane on the flightline on Ellsworth Air Force Base, S.D., July 21, 2012. Many of Katrenak's own Airmen, along with other Airmen in non-aviation roles, will be conducting a wide range of tasks to ensure the success of providing critical, long-range capability of B-1 aircrews. (U.S. Air Force photo by Airman Ashley J. Cass/Released)