9/11 Remembrance ceremony
U.S. Air Force honor guardsmen render a salute during the National Anthem sung by Airman 1st Class Heather Bradley, 355th Security Forces Squadron member, during a 9/11 Remembrance ceremony at Davis-Monthan Air Force Base, Ariz., Sept. 11, 2017. The ceremony was in honor of the nearly 3,000 lives lost during the Sept. 11, 2001 terrorist attacks. (U.S. Air Force photo by Airman 1st Class Giovanni Sims)