National Museum of Nuclear Science & History
Allman worked at the 100 B Area at Hanford during the Manhattan Project.
R.J. Stepheson was a consultant at the Metallurgical Laboratory in Chicago during the Manhattan Project.
Ed Helfenberger worked for the Roane-Anderson Company.
Charles W. Brooks served in the 603rd Air Engineering Squadron.
Frank S. Brown served in the 1st Ordnance Squadron.