National Museum of Nuclear Science & History
Seymour Calvert served for 11 months in the Special Engineering Detachment at Los Alamos. He specialized as a chemical engineer, and carried out experiments with beryllium that were often dangerous.
Donald L. Sheets served in the 603rd Air Engineering Squadron.
Phil Gardner was senior labor recruitment supervisor for the Hanford site. Although he was first an employee of the DuPont Company, he worked under the direction of the War Manpower Commission and his tasks were assigned according to the needs of the War Department.
James Murray was a security officer at Los Alamos during the Manhattan Project. He led a plainclothes operation under the pseudonym Paul Sheridan, and suspected J.
