NASA astronauts Chris Cassidy and Robert Behnken start 7-hour spacewalk
NASA astronauts Chris Cassidy and Robert Behnken begin seven-hour spacewalk to replace ageing batteries on the International Space Station The spacewalk is the latest in a series of mission to replace ageing batteries Cassidy and Behnken will swap out nickel-hydrogen batteries for lithium-ion It is the 229th spacewalk from the ISS and the eighths walk … Read more
