The US did this as well: http://www.youtube.com/watch?v=ZWSMoE3A5DI

British exposed military to a hydrogen bomb test on Christmas Island, Grapple-X

http://www.youtube.com/watch?v=UhnjbkDotYI

Thanks for pointing this out. So the US is not, in fact, the only nation to have fired nuclear weapons at people. The USSR did it too, except it fired it at it's own people and soldiers.