Airmen, family members and civilians pay respect to the U.S. flag during the 9/11 Remembrance Retreat ceremony in front of the 28th Bomb Wing Headquarters at Ellsworth Air Force Base, S.D., Sept. 11, 2013. The event included remarks by Col. Kevin Kennedy, 28th BW commander, and a retreat ceremony conducted by the base Honor Guard. (U.S. Air Force photo by Airman 1st Class Zachary Hada/Released)