Edward Teller to Richard P. Feynman, October 27, 1965 / Richard P. Feynman to Edward Teller, November 30, 1965 / Isidor I. Rabi to Richard P. Feynman, October 27, 1965 / Richard P. Feynman to Isidor I. Rabi, November 22, 1965 by Edward Teller & Isidor I. Rabi narrated by Johanna Parker / Richard P. Feynman narrated by Richard Poe