. Last Spacewalk Of U.S. Shuttle Era Over

 Last Spacewalk Of U.S. Shuttle Era Over  :The last spacewalk of the shuttle era ended on Tuesday at the International Space Station, where Atlantis is docked on the final mission of the 30-year US Program, reported the AFP.

A pair of U.S. astronauts - Ron Garan and Mike Fossum - were already aboard the ISS as a part of the six-member international Expedition 28 crew. They successfully completed their repair and maintenance tasks at the lab after Atlantis arrived on Sunday.

                                                                                                                                                                                                   The crew of four American astronauts aboard the Atlantis helped support the spacewalk, which was choreographed by mission specialist Rex Walheim and formally ended at 3:53 pm.

The main objective of the spacewalk was to retrieve a failed ammonia pump from the orbiting outpost and place it into the shuttle's payload for return to Earth. The task was accomplished early in the six hour, 31 minute spacewalk.

The pair also attached a Robotic Refueling Module experiment to the lab. The RRM is a joint US-Canadian project aims to test technologies for repairing and refueling satellites in space.