The film Hypothetical Risk, The Cambridge City Council's hearings on DNA Experimentation in Cambridge was recorded in June 1976 at City Hall, Cambridge, Massachusetts. Mayor Alfred Vellucci and city councillors Saundra Graham and David Clem are among those to question a panel of scientists including Mark Ptashne (Harvard professor of biochemistry and molecular biology), Daniel Branton (chairman, Harvard Safety Committee), Maxine Singer (National Institute of Health biochemist), Ruth Hubbard (Harvard professor of biology) and Jonathan King (MIT associate professor of biology). Produced by the MIT Oral History Program for the Recombinant DNA History Project in 1978. View more MIT150 videos at Multimedia.