National Museum of Nuclear Science & History
Irvin Mastin worked for the J.A. Jones Construction Company.
John Wickersham was a military policeman and guard at Los Alamos during the Manhattan Project. His duties included patrolling the perimeter of the site on horseback.
James B. Snodgrass was a member of the Mounted Military Police working on site security at Los Alamos and the Trinity test site.
William J. Johnston served in the 1027th Air Material Squadron.
J. B. Marcum worked for the Union Carbide & Carbon Corporation.
