Radiolab had a great episode about nuclear weapons in the US. At the ~51:26 mark of the episode http://www.wnyc.org/radio/#/747788 http://www.wnyc.org/radio/#/

Radiolab had a great episode about nuclear weapons in the US. At the ~51:26 mark of the episode http://www.wnyc.org/radio/#/747788 http://www.wnyc.org/radio/#/747788 there's a great description of what the explosion of a hydrogen bomb was like.