The International Space Station has a big, new closet.
The visiting Atlantis astronauts used a pair of robot arms Tuesday to install a Russian compartment to the space station. The 20-foot chamber is stuffed with more than 3,000 pounds of supplies.
The Russian Space Agency launched a similar compartment aboard an unmanned rocket last November. This was the first time NASA delivered a Russian compartment to the space station.
The module, named Rassvet or Dawn in Russian, will be used for storage and science work and will also serve as a docking port.
Tuesday morning's construction work was squeezed between spacewalks. On Wednesday, a pair of shuttle astronauts will float back out to replace space station batteries.