National Museum of Nuclear Science & History
John Leahy worked for the United States Engineer District Office.
W. A. Gracey worked for the Roane-Anderson Company.
F. D. McIntosh served in the 509th Headquarters and Base Services Squadron.
Attended the Illinois Institute of Technology.
Hannibal Fraga was an engineer. He joined the Manhattan Project in the fall of 1944. He worked in the inspection department at Los Alamos.
