The 600 Miles of Remembrance during this year’s Coca-Cola 600 at Charlotte Motor Speedway honored service members who’ve made the ultimate sacrifice while defending our nation.

Over Memorial Day weekend, AJ Allmendinger and the No. 47 Chevrolet SS team honored Army Spc. Douglas J. Green by displaying his name on Allmendinger’s windshield. Green, who was killed in action in Afghanistan in 2011, is part of the USO’s extended family because his sister, Krissy, works for the organization.

“For Doug’s name to be honored in such a special way means more to my family than one can imagine,” Green said in a release. “Doug may not physically be here, but gestures like this by Kroger and JTG Daugherty Racing allow his legacy and memory to continue on. They provide our family and Doug’s friends a piece of comfort and help to show those who have made the ultimate sacrifice are never forgotten.”

You can send a message of support and thanks directly to service members via the USO’s Campaign to Connect. Your messages will appear on screens at USO locations around the world.