Saigon Execution, Eddie Adams, 1968
Associated Press photographer Eddie Adams was on the streets of Saigon on February 1, 1968 and he came upon Brigadier General Nguyen Ngoc Loan, chief of the national police, standing alongside Nguyen Van Lem, the captain of a terrorist squad who had just killed the family of one of Loan’s friends. Adams thought he was watching the interrogation of a bound prisoner. But as he looked through his viewfinder, Loan calmly raised his .38-caliber pistol and fired a bullet through Lem’s head.