U.S. Air Force Col. David Vanderburg, the 97th Mission Support Group commander, gives a speech as the guest speaker for the 9/11 memorial ceremony, Sept. 11, 2020, at Altus Air Force Base, Oklahoma. The purpose of the ceremony was to honor the firefighters, law enforcement officers, and medical responders who lost their lives on this day 19 years ago during the attacks on 9/11. (U.S. Air Force photo by Staff Sgt. Cody Dowell)