Joseph Oakland Hirschfelder was an American physicist who participated in the Manhattan Project and in the creation of the nuclear bomb.
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Thin Man plutonium gun test casings at Wendover Army Air Field, as part of Project Alberta in the Manhattan Project. A Fat Man casing can be seen behind them.
Eugene Paul Wigner was a Hungarian-American theoretical physicist who also contributed to mathematical physics. He received the Nobel Prize in Physics in 1963 "for his contributions to the theory of the atomic nucleus and the elementary particles, particularly through the discovery and application of fundamental symmetry principles".
Wigner in 1963
Werner Heisenberg and Eugene Wigner (1928)
Wigner receiving the Medal for Merit for his work on the Manhattan Project from Robert P. Patterson (left), March 5, 1946
The Chianti fiasco purchased by Wigner to help celebrate the first self-sustaining, controlled chain reaction. It was signed by the participants.