<p>European Space Agency astronaut Luca Parmitano, Expedition 36 flight engineer, participates in a spacewalk as work continues Tuesday on the International Space Station. A little more than one hour into the spacewalk, Parmitano reported water floating behind his head inside his helmet. Parmitano was reported to be fine after the dangerous episode, which might have been caused by an unprecedented leak in the cooling system of his suit.</p>

July 18, 2013