Air Force Maj. Ryan Vanveelen, U.S. Air Force Honor Guard director of operations, passes off a folded flag to Army Maj. Steven Curtis, North Carolina Defense Congressional fellow, following a ceremony in honor of Capt. Glenn Cook in front of the Vietnam Veteran’s Memorial, in Washington D.C., May 19, 2015. Cook’s plane was shot down near Nha Trang, Vietnam, Oct. 21, 1969. His remains were never found. (U.S. Air Force photo/Senior Airman Joshua R. M. Dewberry)