Solar Sail Ready for Liftoff

After four years of planning, building and testing, Cosmos 1, the first solar sail spacecraft, is ready for Earth orbit. We cover the Nov. 9 press conference with Planetary Society Executive Director Lou Friedman and Ann Druyan, widow of Carl Sagan. Apollo 11 astronaut Buzz Aldrin adds his thoughts in a special interview. Emily has a real Q&A cliffhanger, and Bruce joins the solar sail party with a new What's Up trivia contest.