NASA astronaut Sunita Williams demonstrates how to use the International Space Station's exercise bike during an interview with CNN. Williams is training to participate in the Nautica Malibu Triathlon... more 
NASA astronaut Sunita Williams demonstrates how to use the International Space Station's exercise bike during an interview with CNN. Williams is training to participate in the Nautica Malibu Triathlon from orbit. less 
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SPACE.com | Photo By NASA TV
Tue, Aug 14, 2012 10:24 AM EDT