Staff Sgt. John Sewell, 633d Security Forces Squadron investigator, leads the National Police Week Warrior Ride down Colonial Parkway in Yorktown, Va., May 19, 2011. In 1962, President John F. Kennedy signed a proclamation designating May 15 as Police Officers Memorial Day and the week in which that date falls as National Police Week. (U.S. Air Force photo by Airman 1st Class Racheal Watson)(RELEASED)