File:Castle Bravo Blast.jpg

Summary
http://commons.wikimedia.org/wiki/File:Castle_Bravo_Blast.jpg Nuclear weapon test Bravo (yield 15 Mt) on Bikini Atoll. The test was part of the Operation Castle. The Bravo event was an experimental thermonuclear device surface event.

Castle Bravo, March 1, 1954 >15 Mt, showing multiple condensation rings and several ice caps.