National Museum of Nuclear Science & History
I. E. Martin worked for the Union Carbide & Carbon Corporation.
Hensley worked for the Stone and Webster Engineering Corporation.
Carl Perrin worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Edward P. Hayes was a laboratory assistant at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Daniel J. Keefe was a security guard at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
