National Museum of Nuclear Science & History
H. J. Ratjen worked for the Tennessee Eastman Corporation at the Y-12 Plant.
Rolf Landshoff (1911-1999) was a German-American physicist. Soon after receiving a Ph.D. in engineering from the Institute of Technology in his native Berlin, Landshoff began to feel nervous about his place in his home country.
Gavin Hadden was an American civil engineer who served as special assistant to General Leslie R. Groves during the Manhattan Project.
John Tucker worked for the United States Engineer District Office.
