Senior Master Sgt. Leonard Arsenault, 11th Security Forces Group Senior NCO in charge, acts as a road guard during a 9/11 Memorial Ruck March Sept. 11, 2012, at Joint Base Andrews. Md. More than 25 Airmen participated in the three-hour march that stretched a total distance of 9 miles and 11,000 meters around the perimeter of the installation. (U.S. Air Force Photo/Senior Airman Perry Aston) (Released)