U.S. Air Force Col. Ricky Mills, 17th Training Wing commander, speaks to the crowd during a special D-Day retreat in front of the Norma Brown building on Goodfellow Air Force Base, Texas, June 6, 2019. Mills spoke on remembering the nearly 5,000 American troops who died on D-Day. (U.S. Air Force photo by Airman 1st Class Zachary Chapman/Released)