25 Best HBO Original Movies You Can't Watch Anywhere Else

On August 6, 1945, the first-ever nuclear bomb used in war was detonated over Hiroshima, Japan. Three days later, a second nuclear bomb erupted over Nagasaki. When it was over, hundreds of thousands of Japanese civilians were dead or dying.

In the 2007 documentary "White Light/Black Rain: The Destruction of Hiroshima and Nagasaki," Steven Okazaki interviews 14 survivors of this bombing. Most of them were children at the time of the attack, the youngest being Keiji Nakazawa, who was six when he survived — he went on to chronicle his experiences in the landmark manga "Barefoot Gen." Okazaki doesn't forget the American side of the equation either, as he interviews both scientists and former Air Force officers who were aboard the planes that dropped the bombs.

Archival footage used alongside these interviews makes "White Light/Black Rain" a harrowing and deeply affecting watch. Okazaki doesn't seem interested in a historical debate over who was right or wrong. Rather, he hopes to focus on the unacceptable human cost, in the hopes that it never happens again.