U.S. Service members participate in the 2015 National Peace Officers’ Memorial Ceremony, at Langley Air Force Base, Va., May 11, 2015. Along with the opening ceremony, a Defender’s Challenge, K-9 Competition, weapons display, luncheon and golf tournament took place for Joint Base Langley-Eustis’ Police Week. (U.S. Air Force photo by Senior Airman Breonna Veal/Released)