National Museum of Nuclear Science & History
Sanford McDonnell was a mechanical engineer with the Special Engineering Detachment at Los Alamos from April 1944 to April 1946.
Manuel Montes Alcalde (1921-2009) was a machinist at Los Alamos during the Manhattan Project. Alcalde was born in San Leandro, California.
Sampson Powers worked for the Tennessee Eastman Corporation at the Y-12 Plant.
