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KENNEDY SPACE CENTER, FLA. - In the distance, a tug boat maneuvers the Pegasus barge out of the Turn Basin at NASA’s Kennedy Space Center. The barge is carrying external tank #120, which is being returned to NASA’s Michoud Assembly Facility in Louisiana for additional modifications. The barge is being moved to Port Canaveral where one of NASA’s solid rocket booster retrieval ships will take it and tow it around the Florida peninsula to Michoud. This tank is the first of the newly designed tanks that were delivered to Kennedy. Previously, the tank was stacked with Discovery and, more recently, Atlantis. The tank has already gone through two tanking cycles during tanking tests but was replaced with tank #121 for Discovery’s return to flight mission STS-114.