National Museum of Nuclear Science & History
Florentino Ortiz was a carpenter at Los Alamos during the Manhattan Project.
Heffner worked at the 200 East Area at Hanford during the Manhattan Project.
Juan Romero was a staff worker at Los Alamos during the Manhattan Project.
Melvin A. Miller was a draftsman at the University of Chicago Met Lab. In 1946, he sketched two famous drawings of Chicago Pile-1 based on the descriptions of scientists who were present when it went critical.
