Smile! Astronaut snaps a picture during spacewalk

NASA astronaut Chris Cassidy, Expedition 36 flight engineer, uses a digital still camera during a spacewalk outside the International Space Station on Tuesday. A little more than one hour into the spacewalk, European Space Agency astronaut Luca Parmitano (out of frame) reported water floating behind his head inside his helmet. The water was not an immediate health hazard for Parmitano, but Mission Control decided to end the spacewalk early. Read full story