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)

Members of the U.S. Air Force Concert Band perform for an audience of military veterans during the DFW Honor Flight concert, at Joint Base Anacostia-Bolling, April 13, 2019. The concert 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)

Members of the U.S. Air Force Concert Band and Singing Sergeants perform for an audience of military veterans during the DFW Honor Flight concert, at Joint Base Anacostia-Bolling, April 13, 2019. The concert 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)

Members of the U.S. Air Force Concert perform for an audience of military veterans during the DFW Honor Flight concert, at Joint Base Anacostia-Bolling, April 13, 2019. The concert 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)

An audience member records the DFW Honor Flight performance, 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)

Attendees dance during the 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)

Members of the U.S. Air Force Concert Band and Singing Sergeants perform for an audience of military veterans during the DFW Honor Flight concert, at Joint Base Anacostia-Bolling, April 13, 2019. The concert 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)

Members of the U.S. Air Force Singing Sergeants bow before an audience of military veterans during the DFW Honor Flight concert, at Joint Base Anacostia-Bolling, April 13, 2019. The concert 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)