| 
                                                                       Installation
                                                                      Day 
                                                                      It was
                                                                      "installation
                                                                      day"
                                                                      on the
                                                                      International
                                                                      Space
                                                                      Station.
                                                                      The
                                                                      Atlantis
                                                                      and
                                                                      Expedition
                                                                      13 crews
                                                                      worked on
                                                                      attaching
                                                                      the P3/P4
                                                                      truss
                                                                      during the
                                                                      first of
                                                                      three
                                                                      scheduled
                                                                      spacewalks
                                                                      by STS-115
                                                                      shuttle
                                                                      crew
                                                                      members on
                                                                      Sept. 12,
                                                                      2006.
                                                                      Mission
                                                                      specialist,
                                                                      Astronaut
                                                                      Joseph R.
                                                                      Tanner,
                                                                      pictured
                                                                      as he
                                                                      translated
                                                                      along the
                                                                      station
                                                                      hardware,
                                                                      later was
                                                                      joined by
                                                                      mission
                                                                      specialist
                                                                      Heidemarie
                                                                      M.
                                                                      Stefanyshyn-Piper.  |