Photograph of a Vietnamese soldier threatening a Viet Cong (Vietcong) prisoner. United Press International supplied caption reads: A Vietnamese soldier threatens to stab a Viet Cong prisoner if he does not release information of the whereabouts of his unit. A number of Viet Cong were captured during a sweep of Thanh Quit village by South Vietnamese troops supported by U.S. Marines. Photograph completed while on assignment for UPI-United Press International.