In this image rendered from video and released by NASA, the space shuttle Endeavour is shown as it approaches the international space station before docking Friday, July 17, 2009. The KIBO lab section of the space station is shown at bottom. (AP Photo/NASA TV)
CAPE CANAVERAL, Fla. -- It's spacewalking day at the shuttle-station complex.
At high noon Saturday, two astronauts will venture out to help attach a platform for science experiments.
It's the third and final piece of Japan's huge billion-dollar lab.
And it's the first of five spacewalks planned for the shuttle flight.
Endeavour arrived at the international space station Friday, boosting the population for now to a record 13.
Before docking, the shuttle performed a backflip for space station cameras.
NASA says the analysis is ongoing, but so far Endeavour looks to be in good shape for re-entry at the end of the month.
An unusually large amount of foam broke off Endeavour's fuel tank at liftoff, and some pieces dinged the shuttle.