National Museum of Nuclear Science & History
MacCready worked in the 200 West Area at Hanford during the Manhattan Project.
Alan Upson Seybolt was a metallurgist who worked at Los Alamos during the Manhattan Project. Seybolt married Dorothea “Dot” Hoover Seybolt, and the couple had two sons.
S. D. Tatalovich worked for the United States Engineer District Office.
