A U.S. Airman and Soldier participate in a National Police Week opening ceremony at Langley Air Force Base, Va., May 16, 2016. Each year, May 15 marks Peace Officers' Memorial Day and the week in which the date falls as Police Week, which recognizes law enforcement officers who lost their lives in the line of duty. (U.S. Air Force photo by Staff Sgt. R. Alex Durbin)