What would it take for humans to be able to live and work on Mars? What challenges will governments or companies need to overcome to be able to send people to the Red Planet? In this segment, Ira talks with Pat Duggins, author of the new book "Trailblazing Mars: NASA's Next Giant Leap." We'll talk about the history of Mars exploration, and look forward to the future.
Produced by Flora Lichtman, Correspondent and Managing Editor, Video