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Sunday, February 19, 2012

John Glenn, 1st American in Orbit, Pushes for Manned Mars Missions | John Glenn & 50th Anniversary of Friendship 7 Flight | Mars & Mars Exploration | Space.com

John Glenn, 1st American in Orbit, Pushes for Manned Mars Missions | John Glenn & 50th Anniversary of Friendship 7 Flight | Mars & Mars Exploration | Space.com:

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