Arthur R. Hanson

Louis H. Hempelmann

Louis Henry Hempelmann (1914-1993) was Director of the Health Group at the Los Alamos site of the Manhattan Project.

John Marshall

Marshall worked in the 100 D Area at Hanford during the Manhattan Project.

Leo Reese

Mary Lou Curtis

Mary Lou Curtis joined the Manhattan Project in Dayton, Ohio in 1943. Mrs. Curtis worked in the Counting Room at Monsanto’s Unit III facility, where she developed new methods to measure and analyze radioactive materials, such as polonium, which was used as the trigger for the atomic bombs.