Hiroshima & Nagasaki
I chose not to watch the Hiroshima and Nagasaki documentary recently, preferring the BBC's great new documentary Coast.
I read about the Hibakusha, and am appalled at the terror of the attack and the unthinkable aftermath and years of suffering these people have endured.
However I wasn't alive during the second world war and it's important not to isolate these bombings from the overall picture and view them out of context.
Anyway I'll shut up before I get myself in trouble, wikipedia (as ever) has a nice rounded post on the subject.
http://en.wikipedia.org/wiki/Atomic_bombings_of_Hiroshima_and_Nagasaki
http://www.zvis.com/nuclear/nukimgs.shtml