National Museum of Nuclear Science & History
Joe Romero was a staff worker at Los Alamos during the Manhattan Project.
Cunningham worked in the United States Engineer District Office.
Morris S. Kaplan was a Chemical Engineer for the Houdaille-Hershey Company in Decatur, Illinois. Kaplan was born in Massachusetts in 1921 and grew up in Chicago, Illinois.
Frei worked for Stone and Webster Engineering Corporation.