This will be first of five launches this year before the shuttle fleet is retired . Comment: Shuttle will deliver final U.S. portion of the international space station . NASA plans to retire its space shuttles Discovery , Endeavour and Atlantis later this year . NASA has been looking for places to house the shuttles once they are retired .
This will be first of five launches this year before the shuttle fleet is retired . Comment: Shuttle will deliver final U.S. portion of the international space station . NASA has been looking for places to house the shuttles once they are retired .