National Museum of Nuclear Science & History
Mars worked for Stone and Webster Engineering Corporation.
Lawrence L. Back served in the 393rd Bombardment Squadron.
Clarence Johnson (1912-2012) was a Canadian-born chemical engineer. He was born in Alberta, Canada on November 24, 1912 to Swedish migrant parents.
Walter Horne worked on the Manhattan Project as a chemist at the Y-12 Plant in Oak Ridge Tennesee from 1943 to 1945.
