Civil Engineers honor flag at retreat Published Oct. 19, 2015 By Tech. Sgt. Rick Lisum 910th Airlift Wing Public Affairs YOUNGSTOWN AIR RESERVE STATION, Ohio -- Col. Kevin Riley, 910th Mission Support Group commander, salutes while the flag is lowered during retreat. Retreat is a military ceremony signaled by a bugle call at the end of the duty day, providing troops a chance to pay respects to the U.S. flag. Riley officiated the retreat for the 910th Civil Engineer Squadron during the Unit Training Assembly, Oct. 3, 2015. (U.S. Air Force photo/Tech. Sgt. Rick Lisum)