National Museum of Nuclear Science & History
Morris S. Kaplan was a Chemical Engineer for the Houdaille-Hershey Company in Decatur, Illinois. Kaplan was born in Massachusetts in 1921 and grew up in Chicago, Illinois.
Chalgren worked at the 200 West Area at Hanford during the Manhattan Project.
Monroe Feder was born on February 19, 1919 in Irvington, New Jersey. In 1943, he graduated from New York University.