On the 1st February 1968, American photojournalist Eddie Adams took a photograph of South Vietnamese National Police Chief General Nguyễn Ngọc Loan executing Viet Cong officer Nguyễn Văn Lém in Saigon. The photograph’s publication in the New York Times rallied US citizens to the anti-war movement and earned Adams a Pulitzer Prize for Spot News Photography in 1969.

The Tet Offensive had begun on the 30th January, and saw over 80,000 communist troops carry out a series of surprise attacks against South Vietnamese forces and their allies. It’s reported that, two days later, in the early morning of the 1st ...