The Manhattan Project was a secret research and development initiative undertaken by the United States during World War II to create the first nuclear weapons. It began in 1942 and involved collaboration between the U.S., the United Kingdom, and Canada. The project was driven by the fear that Nazi Germany was developing its own atomic bomb and aimed to harness the power of nuclear fission. Key figures in the project included physicist J.

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Manhattan Project by Ciro Santilli 37 Updated +Created
Video 1.
Historic, unique Manhattan Project footage from Los Alamos by Los Alamos National Lab
. Source.
Mostly the daily life part of things, but very good, includes subtitles explaining the people and places shown.
Marked with identifier "LA-UR 11-4449".