National Museum of Nuclear Science & History
Barr worked for Stone and Webster Engineering Corporation.
Joseph Caldwell was a security guard at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Frank Sada Menchaca was born April 3, 1919. He served as a U.S. Army Military Police soldier assigned to Military Police Detachment No.
E. C. Dunlop worked at the 100-B Area at Hanford during the Manhattan Project.
