Staff Sgt. Marquin King, 633d Security Forces Squadron patrolman, holds the U.S. flag during the Police Officers' Memorial ceremony at Langley Air Force Base, Va., May 16, 2011. The ceremony, held in conjunction with National Police Week, paid tribute to law enforcement officers who lost their lives in the line of duty. (U.S. Air Force photo by Staff Sgt. Ashley Hawkins)(RELEASED)