Here is an interesting perspective of a British Seaman POW who the A-Bomb at Nagasaki saved but eventually killed. I corresponded with former POW Captain Duffy about one of his other essays praising "those who listened", the US Pacific ham radio operators who monitored radio Tokyo for reports of US captured airmen and soldiers. My grandparents received a post card from a "listener" detailing the capture of their oldest son who was murdered by the Japanese shortly after capture.
http://www.usmm.org/duffygavehimlife.html