National Museum of Nuclear Science & History
Margaret Strombeck was a swtichboard operator at the Metallurgical Laboratory in Chicago during the Manhattan Project.
Pettengill served in the 393rd Bombardment Squadron.
Edward J. Fredrick was a research assistant at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Clyde Wilhoite worked for the Tennessee Eastman Corporation at the Y-12 Plant.