FILE - In this June 15, 1967 file photo, American infantrymen crowd into a mud-filled bomb crater and look up at tall jungle trees seeking out Viet Cong snipers firing at them during a battle in Phuoc Vinh, north-Northeast of Saigon in Vietnam's War Zone D. The war ended on April 30, 1975, with the fall of Saigon, now known as Ho Chi Minh City, to communist troops from the north. (AP Photo/Henri Huet, File)