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A New Era Begins

World's First Self-Sustaining Nuclear Chain Reaction Produced....December 2, 1942.

Created By

Adam M. Rosenfeld

Web Team Intern

Smithsonian National Postal Museum

Alexander T. Haimann

Collections Specialist

Smithsonian National Postal Museum

On December 2, 1942, the Manhattan Project’s team of scientists produced the world’s first self-sustaining nuclear chain reaction at the University of Chicago. To commemorate this important accomplishment, the Smithsonian National Postal Museum has created this mini-exhibit highlighting different objects with connections to this event.

Scott 3533

The 34-cent Fermi stamp was issued September 29, 2001, the centennial of his birth.