One of my all time favorite documentaries. If you've never seen it, it is highly recommended. It profiles the nuclear weapons program from the start, and has amazing footage of the test explosions which are colorized. The musical score is awesome as well. It also gives you an idea of the the fear people lived in during the cold war. They also have the amazing footage of 'Tsar Bomba' the 57 megaton device the Soviets detonated, making it the largest human created explosion ever (in the movie they refer to it as 'the monster bomb').
If you are a science buff, or a war buff, you'll love it. Even better it is narrated by Bill Shatner, and better yet, you can watch it online, free.
http://topdocumentaryfilms.com/trini...ic-bomb-movie/