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National Museum of Nuclear Science & History

James J. Johnson

CorporalTinian Island

Wendover, UT
509th Composite GroupManhattan Project VeteranMilitary Veteran
North Airfield at Tinian Island.

James J. Johnson served in the 603rd Air Engineering Squadron.

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S. H. Butt

Oak Ridge, TN

Butt worked in the United States Engineer District Office.

Arthur L. Allen

K-25 Plant

Attended the South Dakota School of Mines and Technology. 

Edmond E. Babinsky

X-10 Graphite Reactor

Attended Central College.

Carl Helmholz

University of California, Berkeley

Carl Helmholz (1915-2003) was an American physicist involved with the Manhattan Project.  Helmholz was born on May 24, 1915 in Evanston, Illinois.