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National Museum of Nuclear Science & History

Richard A. Vaughn

Instrument EngineerK-25 Plant

Oak Ridge, TN
EngineerManhattan Project VeteranMilitary VeteranSpecial Engineer Detachment
Oak Ridge, K-25

Attended the University of Oklahoma.

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John L. Allen

Los Alamos, NM

Carl B. Yantis

K-25 Plant

Attended the University of Texas. He was married to Jane Yantis, who came with him to Oak Ridge during the war.

P. F. Thomason

X-10 Graphite Reactor

P. F. Thomason worked for Clinton Laboratories at the X-10 Reactor.

Waldemar Nielsen

Japan

​ Waldemar Nielsen (1917-2005) worked on the postwar surveys of Hiroshima and Nagasaki in Japan. Nielsen was born in Greensburg, Pennsylvania.