NASA astronauts to conduct 7-hr spacewalk to fix broken ISS robotic arm

Two NASA astronauts, Chris Williams and Jessica Meir, will step outside the International Space Station (ISS) on June 30 to repair a fault in Canadarm2, a 17.6-metre robotic arm. The duo will spend about six hours and 40 minutes on the spacewalk, replacing a malfunctioning wrist joint on Canadarm2, which has been in operation for more than 25 years.