Astronaut-climber: 'I'm not a risk taker'

He's summited Mount Everest. He's walked in space seven times.

Source: http://www.cnn.com/2011/HEALTH/07/08/parazynski.astronaut.everest/index.html?eref=rss_health&utm_source=feedburner&utm_medium=feed&utm_campaign=Feed:+rss/cnn_health+(RSS:+Health)

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