UPDATED: VIDEO: Some Serious Fireworks

July 1962:  U.S. detonates nuke in outer space: “The hydrogen bomb code-named ‘Starfish Prime’ set off on July 9 produced an artificial extension of the Van Allen belts visible across the Pacific Ocean.”

NPR has video here, some of which was compiled by director Peter Kuran for his documentary Nukes in Space.

UPDATE: Bad link!  Just fixed.  Sorry about that.