National Museum of Nuclear Science & History
Chalgren worked at the 200 West Area at Hanford during the Manhattan Project.
Walter Main worked for the United States Engineer District Office.
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.
