Nuclear Museum Logo
Nuclear Museum Logo

National Museum of Nuclear Science & History

Leo P. Hassen

Security GuardChicago, IL

Manhattan Project Veteran

Leo P. Hassen was a security guard at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

Related Profiles

Arthur H. Compton

Chicago, IL

Arthur Compton (1892-1962) was an American physicist and winner of the Nobel Prize in Physics. A top administrator and advisor during the Manhattan Project, Compton played a key role in the making of the atomic bomb.

G. T. Cooper

Hanford, WA

Silas M. Epperson

Tinian Island

Silas M. Epperson served in the 1395th Military Police Company, Aviation.

John Tarpenning

Hanford, WA