Robert T. Hassel

S. F. Campbell Jr.

Daniel J. Keefe

Daniel J. Keefe was a security guard at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.

Lawrence Vest

Lawrence Vest was a civil scientist at Los Alamos during the Manhattan Project.

Majorie B. Housewright

Marjorie B. Housewright was a stenographer at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.