Capt. Philip Gunn participates in a flyover during the interment ceremony of retired Brig. Gen. Robinson Risner on Jan. 23, 2014, at Arlington National Cemetery. Risner was the Air Force's 20th ace and survived more than seven years of captivity as a prisoner of war in Vietnam. Gunn is a 336th Fighter Squadron weapons system officer assigned to Seymour Johnson AFB, N.C.