National Museum of Nuclear Science & History
Harmon worked for Stone and Webster Engineering Corporation.
Stanley Levitt worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Lockhart worked at the 100-B Area at Hanford during the Manhattan Project.
Charles J. Spiegl was a civilian scientist employed by the Manhattan Project. He was involved in radiation toxicology, studying the effects of radiation on animals at the Trinity Site near Alamogordo, New Mexico.
