After handing off a girder earlier this afternoon, a repositioned robotic arm on the International Space Station has grabbed it back. Crews in orbit today are moving a 45-foot truss segment from shuttle Discovery's payload bay to the starboard end of the station's integrated truss, or backbone.
The station's arm started the work, because the shuttle's arm didn't have the necessary clearance. After handing it off, the station arm rolled down a track so it would be positioned to receive the girder again.
These NASA TV picture show the station arm slowly zeroing in on a pin-shaped grapple fixture on the truss. After the second handoff, the girder - called the Starboard 6 truss, or "S6" - will be parked overnight, ready for installation Thursday.
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