National Museum of Nuclear Science & History
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.
Zweifel worked at the 200 East Area at Hanford during the Manhattan Project.
Halpern worked in the United States Engineer District Office.