Tech. Sgt. Ashley Keeks and Tech. Sgt. Adrienne Kling, U.S. Air Force Singing Sergeants sopranos, pose with a retired Vietnam veteran before a DFW Honor Flight concert, at Joint Base Anacostia-Bolling, April 13, 2019. The USAF Concert Band and Singing Sergeants honored military veterans from WWII, Vietnam and Korean War by playing music from the era. (U.S. Air Force photo by Staff Sgt. Cary Smith)