"In 1971, as American forces hastened their withdrawal from Vietnam, the U.S.-backed Saigon regime launched a bold attack into Laos, hoping to cut North Vietnam's supply line, the fabled Ho Chi Minh Trail. Three days into the risky operation called Lam Son 719, a helicopter was hit by enemy fire and exploded in a fireball, killing four top combat photographers - Larry Burrows of Life magazine, Henri Huet of the Associated Press, Kent Potter of United...