Ellsworth Airmen from the 28th Security Forces Squadron and the 28th Civil Engineer Squadron render a salute during a 9/11 Memorial Ceremony at Ellsworth Air Force Base, S.D., Sept. 11, 2015. Airmen gathered together in remembrance of the men and women who lost their lives during the attacks on the Pentagon, the Twin Towers and the failed hijacking of United Airlines flight 93, Sept. 11, 2001. (U.S. Air Force photo by Airman 1st Class James L. Miller/Released)