National Museum of Nuclear Science & History
Hugo Leckelt was a laborer at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Earl Pond, Sr. worked for the J.A. Jones Construction Company.
John H. Martens was a research associate and chemist at the University of Chicago Met Lab and a member of the Special Engineer Detachment at Oak Ridge.
L. L. Brown worked for the Roane-Anderson Company.
S. D. Tatalovich worked for the United States Engineer District Office.