Spacewalk Begins NASA astronauts Chris Williams and Jessica Meir stepped outside the International Space Station on Tuesday to replace a faulty wrist joint on Canadarm2, the Canadian-built robotic arm that has kept the orbiting laboratory running for more than 25 years. Footage shows European Space Agency astronaut Sophie Adenot and NASA astronaut Jack Hathaway carrying … Continue reading Spacewalk surgery – NASA astronauts replace faulty wrist joint on ISS robotic arm