Mark Kelly

Former Rep. Gabrielle Giffords and her husband, astronaut Mark Kelly, speak during the dedication ceremony of the Gabriel Zimmerman Meeting Room in the U.S. Capitol Visitors Center on April 16, 2013 in Washington, D.C. (credit: Chip Somodevilla/Getty Images)

Mark Kelly, Twin Brother To Help NASA Study Effects Of Spaceflight On The Human Body

Astronaut Mark Kelly and his twin brother will help NASA study the effects of spaceflight on the human body.

CBS Tampa–03/10/2014

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