National Museum of Nuclear Science & History
Henry Jarrell, Jr. worked for the Kellex Corporation at the K-25 Plant.
Manuel Montes Alcalde (1921-2009) was a machinist at Los Alamos during the Manhattan Project. Alcalde was born in San Leandro, California.
Arthur N. Jaffey was an associate chemist at the University of Chicago’s Metallurgical Laboratory (“Met Lab”) during the Manhattan Project.
Mary Stephens worked for the United States Engineer District Office.
