National Museum of Nuclear Science & History
MacDonald worked for Stone and Webster Engineering Corporation.
Richard Feynman (1918-1988) was an American theoretical physicist who received the Nobel Prize in 1965.
J. Fletcher, Jr. served in the 390th Air Service Group.
Edward F. “Ed” Hammel was an American chemist. Hammel had just completed his Ph.D. at Princeton University when he joined a Canadian heavy water project sponsored by the school in 1941.
