Senior Airman Tyler Wiseman, Staff Sgt. David Garver and Airman 1st Class Steven Barnosky, 633d Security Forces Squadron canine handlers, compete in the Keep in Memory Challenge during the 633d Security Forces Squadron Strong Team Competition at Langley Air Force Base, Va., May 18, 2011. The competition was held in conjunction with National Police Week , an annual event held to remember fallen military and civilian defenders. (U.S. Air Force photo by Staff Sgt. Jeff Nevison)(RELEASED)