The space shuttle Discovery docked smoothly with the International Space Station, despite a hitch in its radar system Friday, the third day of its 11-day mission, setting the stage for the assembly of the 13-story orbiting outpost by Japan's Koichi Wakata and six other crew members.
The crew will spend one week attaching two key components to the station.
During the final approach, commander Brian Duffy used a substitute star-tracking system instead of the radar, which broke down Thursday.
It was the first time for a shuttle to link up with another craft without using radar.