Humans first landed on the moon 40 years ago this July. Just three years later, the last human mission left the lunar surface. Ira Flatow talks with Apollo astronauts Alan Bean and Harrison Schmitt about their time on the moon, and whether humans should make the trip again.
Andrew Chaikin, science journalist and space historian, author, Voices From the Moon: Apollo Astronauts Describe Their Lunar Experiences, author with Alan Bean, Mission Control: This Is Apollo, Arlington, Vt.
Alan Bean, astronaut, lunar module pilot, Apollo 12, author, Alan Bean: Painting Apollo, illustrator, Mission Control: This Is Apollo, Houston, Texas
Harrison "Jack" Schmitt, astronaut, lunar module pilot, Apollo 17, author, Return to the Moon: Exploration, Enterprise, and Energy in the Human Settlement of Space, former US Senator, New Mexico, Albuquerque, N.M.
Ross Tierney, founder, The Direct Team, Cocoa Beach, Fla.