National Museum of Nuclear Science & History
Bradley Jr. worked at the 200 West Area at Hanford during the Manhattan Project.
Joe W. Howland was a medical officer in charge of special problems in the US Army, stationed in Oak Ridge, Tennessee and Rochester, New York during the Manhattan Project.
Seymour Calvert served for 11 months in the Special Engineering Detachment at Los Alamos. He specialized as a chemical engineer, and carried out experiments with beryllium that were often dangerous.
Gladys Shipley worked for the United States Engineer District Office.