Watch live! Astronauts taking spacewalk outside space station

NASA astronauts Chris Cassidy and Bob Behnknen will step outside the International Space Station today (June 26) to take a seven-hour spacewalk and you can watch it live here, courtesy of NASA TV. 

The spacewalk will begin at 7:35 a.m. EDT (1135 GMT) and last about seven hours. During that time, Cassidy and Behnken will begin work to replace the station’s old port side nickel-hydrogen batteries with new lithium-ion batteries for the outpost’s solar arrays. It is the first of four spacewalks in upcoming weeks dedicated to the power system upgrade. 

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