Photos edited by John Morris

“D-Day, Omaha Beach,” Robert Capa’s photo of the 1944 Normandy invasion, survived darkroom mishaps to convey with its grainy look much of the urgent drama of the occasion.

South Vietnamese National Police Chief Brig. Gen. Nguyen Ngoc Loan executes a Viet Cong officer with a single pistol shot to the head in Saigon, Vietnam, on Feb. 1, 1968. The photo, by photojournalist Eddie Adams, became one of the Vietnam’s War’s most indelible images, winning a Pultizer Prize in 1969.

In this June 8, 1972, photo taken by Huynh Cong “Nick” Ut, South Vietnamese forces follow terrified children, including 9-year-old Kim Phuc, center, as they run down Route 1 near Trang Bang after an aerial napalm attack on suspected Viet Cong hiding places.