Mission Control Center, Houston, Texas

HOUSTON - The crews of space shuttle Discovery and the International Space Station took a break today in and around transfer work ahead of Wednesday's farewell and undocking of the shuttle. The ten spacefarers also talked with President Barack Obama joined by school children at the White House and later with reporters covering their mission.

The stage is set for Discovery to undock from the station at 2:53 p.m. Wednesday after the crew bids farewell to its temporary home and the Expedition 18 crew, leaving behind Japanese astronaut Koichi Wakata and bringing home Sandy Magnus after four months aboard the station.

Early in the day, the crews gathered for a long distance phone call from President Obama flanked by school children and congressional members to quiz the ten crew members on their mission and life in space.

Later, the crew turned its attention to transfer checklists as the time nears to say goodbye leaving the station larger and more powerful than it was before Discovery arrived.

The formal farewell and hatch closing is scheduled just before noon Wednesday followed by leak checks ahead of departure.

The staggered sleep shift shows the station crew heading to bed about 8:45 p.m. and Discovery's crew 30 minutes later at about 9:15 p.m. Wake up comes at 5:13 a.m. Wednesday to start the final hours of the joint mission.

The next status report will be issued after crew wake up, or earlier if events warrant.

News from Commercial Space Watch