Astronauts begin Flight Day 5

[Rick]

Astronauts aboard the International Space Station and space shuttle Discovery have begun their fifth flight day. Today's activities include entering the Kibo Japanese Pressurized module for the first time, removing and replacing a portion of the station's environmental control system, the carbon dioxide removal assembly, and checking out the orbiter boom sensor system electronics. The sensor system will be used later in the mission to inspect Discovery's heat shield before the shuttle returns to Earth. The space station crew also will replace hardware in their toilet system with new equipment that was launched on Discovery.