Expedition Seven Gets Familiar with ISS Expedition Seven Commander Yuri Malenchenko and NASA ISS Science Officer Ed Lu spent time Tuesday familiarizing themselves with their new home, the International Space Station. This set of daily activities is required during the first two weeks of a crew's stay at the orbital outpost. Malenchenko worked with two Russian experiments, and Lu installed new software into the station's medical equipment computer. They also performed daily maintenance. Expedition Seven's predecessors -- Expedition Six Commander Ken Bowersox, Flight Engineer Nikolai Budarin and NASA ISS Science Officer Don Pettit -- continued rehabilitation activities at the Gagarin Cosmonaut Training Center in Star City, Russia. The rehabilitation activities will help the crewmembers get adjusted to living on Earth after spending 5½ months at the station. Expedition Six left the station and returned to Earth on Saturday.