National Museum of Nuclear Science & History
Irvin Mastin worked for the J.A. Jones Construction Company.
Trask worked at the 200 West Area at Hanford during the Manhattan Project.
O. R. "Big" Simpson was a second lieutenant in military intelligence in charge of convoys carrying plutonium from Hanford to Fort Douglas, Utah.
James R. Gurley served in the 393rd Bombardment Squadron.
