The U.S. space shuttle Discovery has undocked from the International Space Station and started its journey back to Earth.
Discovery backed away from the station Tuesday after a mission that included delivering a new crew member and supplies, and four space walks.
Before undocking, astronauts installed a truss segment to the station's exterior and rewired the station's power system. Astronauts also freed a solar panel that would not retract by remote control or respond to jiggling from the inside of the space station.
The shuttle is scheduled to land Friday at the Kennedy Space Center in Florida.
Some information for this report was provided by AFP, AP and Reuters.