A Martian spacewalk in the offing?
- 00:08:08
- MSNBC
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A Martian spacewalk in the offing?
July 20: Countdown guest host David Shuster and Derrick Pitts, chief astronomer of the Franklin Institute Science Museum, talk about the goals for space exploration and whether Mars will be the next place a human will walk. (Countdown)
MSNBC | July 21, 2009
