Airmen of the 28th Security Forces Squadron carry a large American flag while comrades from other units render proper customs during a flag raising ceremony as part of the 9/11 Remembrance Ruck March on Ellsworth Air Force Base, S.D., Sept. 8, 2012. Nearly 150 Ellsworth Airmen, family members and friends teamed up with area police officers, firefighters and other first responders for the 11-mile rucksack march to commemorate the 11th anniversary of 9/11. (U.S. Air Force photo by Airman 1st Class Kate Thornton-Maurer)