LIVE: NASA astronauts conduct spacewalk to repair robotic arm on International Space Station

NASA embarks on daring mission to save doomed telescope from falling to Earth

NASA spacewalk LIVE: Astronauts Chris Williams and Jessica Meir repair ISS robotics

Astronauts exit ISS to repair malfunctioning equipment

NASA astronauts spacewalk to fix robotic arm

NASA Astronauts Step Outside ISS to Repair Robotic Arm