National Museum of Nuclear Science & History
Caldwell worked at the 200 West Area at Hanford during the Manhattan Project.
Robert Holmberg was born in Fort Dodge, Iowa, and began working on the Manhattan Project at the Chicago Met Lab and at Ames Laboratory in Iowa.
Ann Reser worked for the Tennessee Eastman Corporation at the Y-12 Plant.
John M. Sprecher was a chemical engineer. During the Manhattan Project, he worked for DuPont in Wilmington, DE.
