Pilots and weapon systems officers assigned to the 34th and 37th Bomb Squadrons, attend a step brief during the Combat Hammer exercise at Ellsworth Air Force Base, S.D., May 10, 2017. Combat Hammer is designed to assess and evaluate the reliability, maintainability, suitability and accuracy of precision-guided air-to-ground munitions. (U.S. Air Force photo by Airman 1st Class Donald C. Knechtel)