National Museum of Nuclear Science & History
Barrett worked for Stone and Webster Engineering Corporation.
Walter M. Longfelt was a laborer at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
H. R. Chapman worked for the H. K. Ferguson Company.
Glen F. Skaggs served in the 393rd Bombardment Squadron.
Leonard Krouldis was a laboratory helper at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
