Vietnam

Year: 1968
Photograph by: Eddie Adams

Year: 1968
Photograph by: Eddie Adams

Year: 1968
Photograph by: Eddie Adams

This shows South Vietnamese National Police Chief Brig Gen. Nguyen Ngoc Loan executing a Vietnam Cong officer in Saigon with a single bullet shot to the head. Careful inspection reveals the bullet actually exiting the skull from the other side while the expression reveals both fear and pain.
This was one of the most iconic images of the Vietnam War, earning Adams a Pulitzer in 1969.