Atomic Heritage Foundation

In partnership with the National Museum of Nuclear Science & History

Join Today as an Atomic History Patron Member

Mid-August 1942

Mid-August 1942

Enrico Fermi's group demonstrates an experimental pile with a projected k value of close to 1.04. Achieving a chain reaction is now certain.

Date Range:

1942CE Aug

Era:

1941 to 1942: Getting Organized

Hear the stories of the Manhattan Project

Browse our collection of oral histories with workers, families, service members, and more about their experiences in the Manhattan Project.

Tour the Sites of the Manhattan Project

Tour some of the key locations of the Manhattan Project with an audio guide.

Read recent news & articles

Secretary of DOI Sally Jewel and of DOE Ernie Moniz shake hands on launching the new park as a partnership between their two agencies.

5th Anniversary of the Manhattan Project National Historical Park

Join Today as an Atomic History Patron Member