Enrico Fermi (29 September 1901 - 28 November 1954) was an Italian physicist most noted for his work on the development of the first nuclear reactor, and for his contributions to the development of quantum theory, particle physics and statistical mechanics. He, his wife Laura Fermi, and their children emigrated to New York to escape the anti-Semitic laws promulgated by the fascist regime of Benito Mussolini which threatened Laura for her Jewish origins.
In the U.S., he was a critical figure in the development of the atomic bomb.
Some weeks later, he was allowed to interrogate Lizard POWs Ullhass and Ristin about the Race's knowledge of atomic weapons. Not long after that, with Lizard ground forces threatening to take Chicago, he and the rest of the crew relocated to Denver.. On that trek, he served as best man at the wedding of Sam Yeager and Barbara Larssen, and he and his wife Laura were among the first people to learn that Barbara was pregnant and that her first husband, Jens Larssen, previously presumed dead, was still alive.
Once in Denver, Fermi quickly became the project's liaison with General Leslie Groves.. In just over a year, the team had produced its own bomb, "the Fat Lady".
Enrico Fermi's (1901-1946) decision to move to the United States proved to be his undoing. In 1946, he was one of several physicists who was imprisoned and executed by dictatorial PresidentJoe Steele for being a "wrecker". His wife'sJewish heritage was believed to be a factor in his death.
While Fermi met the same fate in both the short story and the novel, Fermi was executed as part of the so-called Professors' Plot in short story, whereas he was merely a "wrecker" in the novel. In addition, the idea that he was executed due to his wife's Jewish heritage was softened in the novel.