Nuclear chain reaction the last one called ""Perfectionnement aux charges explosives"" was the first patent for the atomic bomb and is filed as patent n°445686 by the Caisse nationale de Recherche Scientifique. In parallel, Szilárd and Enrico Fermi in New York made the same analysis. This discovery prompted the letter from Szilárd and signed by Albert Einstein to President Franklin D. Roosevelt, warning of the possibility that Nazi Germany might be attempting to build an atomic bomb. On December 2, 1942, a team led by Enrico Fermi produced the first artificial self-sustaining nuclear chain reaction with the Chicago Pile-1 (CP-1) experimental reactor in
Enrico Fermi High School Public Schools. In November 2012, a town-wide referendum to appropriate $103 million for additions and renovations to Enfield High School overwhelmingly passed by a 2:1 margin. As a result of the consolidation Enrico Fermi High School is planned to close, resulting in yearly savings of $2 million, which would pay for bonding for the renovations and additions to Enfield High School. The State of Connecticut also will provide more than 70% reimbursement for construction to Enfield High School, as well. Students from Enrico Fermi will move into the expanded high school after construction is finished in 2016-2017, with an expected