Airmen salute an American flag during a flag raising ceremony as part of a 9/11 Remembrance Ruck March on Ellsworth Air Force Base, S.D., Sept. 8, 2012. Airmen, families and first responders from surrounding communities gathered to recognize and honor the nearly 3,000 of lives lost 11 years ago on Sept. 11. (U.S. Air Force photo by Airman 1st Class Kate Thornton-Maurer)