FILE - This combination of 2013 file photos shows European Space Agency astronaut Luca Parmitano of Italy, left, and U.S. astronaut Christopher Cassidy in the Baikonur cosmodrome in Kazakhstan. In one... more 
FILE - This combination of 2013 file photos shows European Space Agency astronaut Luca Parmitano of Italy, left, and U.S. astronaut Christopher Cassidy in the Baikonur cosmodrome in Kazakhstan. In one of the most harrowing spacewalks in decades, Parmitano had to rush back into the International Space Station on Tuesday, July 16, 2013 after a mysterious water leak inside his helmet robbed him of the ability to speak or hear and could have caused him to choke or even drown. His spacewalking partner, Cassidy, had to help him inside after NASA quickly aborted the spacewalk. (AP Photo/Mikhail Metzel, Dmitry Lovetsky) less 
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Associated Press | Photo By Mikhail Metzel, Dmitry Lovetsky
Tue, Jul 16, 2013 7:23 PM EDT