activities of Picone's institute. When he returned to Italy, he saw that there was no hope for a positive change in the political environment. The University of Rome and Consiglio Nazionale delle Ricerche (CNR) stripped him of his positions. After this, he and his wife left Italy for good, using the same visa. On the same day he arrived in New York, the CNR restored him as a consultant to INAC, thanks to the influence of Picone.<ref>Salvadori, Mario G. A tangential life", unpublished autobiography. Large parts of this text with other documents are reported in Mario Salvadori e Mauro Picone, edited by A. Celli, M. Mattaliano and P. Nastasi, published in Italian by CNR Edizioni, Roma (2013)</ref> Career In the United States, Salvadori first worked for the Lionel Train Company until 1940, developing time and motion studies that so impressed the president that he was made an offer to become CEO, which he turned down. During World War II he was – unbeknownst to himself at the time – a consultant on the Manhattan Project for three years. After the war, he took up teaching at Columbia University, where he would become a professor in 1959 in the School of Architecture, Planning and Preservation; he taught at Columbia for 50 years. As he reached retirement age, Salvadori began volunteering to work with under-privileged minority students from inner-city New York public schools. Developing a hands-on method of teaching kids about the built environment, he was able to reach out to thousands of students and teachers, giving them an appreciation of the usefulness of mathematics and science. In 1987 he founded the Salvadori Educational Center on the Built Environment, since renamed the Salvadori Center, a non-profit educational organization in the Upper West Side of Manhattan, near Columbia University, which aims to show students the relevance of math and science using the buildings, bridges, landmarks, and parks in their local communities. From 1954 to 1960, Salvadori worked as a consultant and then principal at Weidlinger Associates, an engineering firm in New York City. He then became a partner until 1991, when he became honorary chairman. As a structural engineer, Salvadori became known for the design of thin concrete shells as he strove to create great architecture in all of his projects, including the concrete structural system for the CBS Building in Manhattan, designed by Eero Saarinen, and the seashell-inspired restaurant building at the