Airmen from the 4th Security Forces Squadron gather prior to the passing of the guidon during the 9/11 Ruck March to Remember in Level Cross, N.C., Aug. 21, 2011. The march is dedicated to the defenders who lost their lives and were injured since the terrorist attacks Sept. 11, 2001. Security forces squadrons will cover 2,182 miles from Lackland Air Force Base, Texas, to Ground Zero in New York. (U.S. Air Force photo/Senior Airman Gino Reyes)