An intriguing Horizon documentary (the second from the Anniversary of Einstein) - looking at how Einstein's work was used to develop the atomic bomb, plus the politics of the era that nurtured its creation:

In the summer of 1939 Albert Einstein was on holiday in a small resort town on the tip of Long Island. His peaceful summer, however, was about to be shattered by a visit from an old friend and colleague from his years in Berlin. The visitor was the physicist Leo Szilard. He had come to tell Einstein that he feared the Nazis could soon be in possession of a terrible new weapon and that something had to be done.

Szilard believed that recent scientific breakthroughs meant it was now possible to convert mass into energy. And that this could be used to make a bomb. If this were to happen, it would be a terrible realisation of the law of nature Einstein had discovered some 34 years earlier.

http://www.bbc.co.uk/sn/tvradio/programmes/horizon/einstein_equation_prog_summary.shtml

The first documentary - Einstein's Unfinished Symphony, is here:
http://www.videosift.com/video/Einsteins-Unfinished-Symphony-Horizon-science-bio-doc-48