National Museum of Nuclear Science & History
Joseph Caldwell was a security guard at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Gebhardt worked for Stone and Webster Engineering Corporation.
David S. Anthony (1918-2010) was an American chemist. After receiving his Ph.D. from the University of Wisconsin-Madison, he joined the University of Chicago Metallurgical Laboratory as an associate chemist.
