Tim Kopra's spacewalk. NASA astronaut Timothy Kopra (born 1963) carrying out a spacewalk outside the International Space Station (ISS) on 15 January 2016. Kopra and ESA astronaut Tim Peake worked to successfully replace a failed voltage regulator in the station's power generation system. The pair ended their space walk early after Kopra reported a small water bubble had formed inside his helmet. Kopra, part of the Expedition 46 crew to the ISS, previously flew in space during Expedition 20 to the ISS in 2009.
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