Retired U.S. Army Chaplain (Col.) Lilton Marks reads an invocation during the Joint Base Langley-Eustis Retiree Appreciation Day at Fort Eustis, Va., May 16, 2015. Marks also spoke at the 50th Vietnam War Commemoration luncheon the previous day to help honor the Vietnam Veterans in attendance. (U.S. Air Force photo by Senior Airman Kimberly Nagle/Released)