Two crew members of the space shuttle Discovery have completed the delicate rewiring of the International Space Station (ISS) during a third spacewalk.
But Astronauts Robert Curbeam and Sunita Williams struggled to fix a jammed solar panel on the ISS.
Nasa has approved a fourth spacewalk, due to take place on Monday, which will delay the shuttle's return by a day.
Mission Control said that the rewired electrical system was powered back up and now operating without problems.