In the former he helped develop practical radar uses for the United States Navy and in the latter he was head of an engineering division at Los Alamos Laboratory.

[3] He helped build the MIT physics department after the war, and was responsible for recruiting Bruno Rossi and Victor Weisskopf to the Institute.

[6] The subject of this non-existent cabal again came up during the Oppenheimer security hearing of 1954 when Zacharias denied a witness's claim to having seen the initials written on an MIT blackboard.

[3] Begun in 1956, it gained additional funding and emphasis in the wake of the Sputnik crisis of 1957, and within ten years half of the country's high school physics students were using the PSSC curriculum of textbooks and experiments.

In the mid 1960s he hosted a series of lectures at Tufts University which acted as the spark for the formation of the pioneering artists-in-the-schools organization Teachers & Writers Collaborative.