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 was part of the National Police Week celebration, paying 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)