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FILE - Troops of the 1st Battalion 5th Cavalry land southeast of Khe Sanh, near Hill 549 in Vietnam, April 1968. (AP Photo/Dang Van Phuoc, File)

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FILE - A wounded soldier is carried during fighting on Highway 13, north of Saigon, Oct. 14, 1972, where government troops are trying to reopen road to the Lai Khe base. (AP Photo/Dang Van Phuoc, File)