National Museum of Nuclear Science & History
J. E. Mason worked for the Roane-Anderson Company.
Luis Alvarez (1911-1988) was an American experimental physicist and winner of the 1968 Nobel Prize in Physics.
Ralph Steinhardt was a member of the Special Engineer Detatchment (SED) at Los Alamos during the Manhattan Project.
Anderson worked at the 300 Area at Hanford during the Manhattan Project.