National Museum of Nuclear Science & History
Harper worked for Stone and Webster Engineering Corporation.
Louis J. Hefferman served in the 1395th Military Police Company, Aviation.
A. L. Smith worked for the J.A. Jones Construction Company.
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.
