January 25, 1995 - Carl Sagan speaking to the Commonwealth Club of Cleveland on who we are and where we stand in the universe.
January 5, 1990 - Carl Sagan, author and astrophysicist, speaking at a Washington D.C. conference co-sponsored by the AMA National Initiative for Science and Technology. Sagan’s address was titled "Education: Strategies for Change," and dealt with the dangers of a scientifically illiterate population.
June 26, 1982 - Cornell professor and author Carl Sagan, Senator Gary Hart (D-Col.), and the Reverend William Sloane Coffin, Jr. discuss how to prevent nuclear war. Recorded at a teach-in at Cornell University in November 1981.