The U.S. astronaut Ronald Garan takes first spacewalk on Tuesday, attaching Japan’s Kibo science module to the International Space Station. With the help of other astronauts inside the station, spacewalkers Michael Fossum and Ronald Garan successfully moved the huge pressurized module of Kibo (which means "hope" in Japanese) from shuttle’s payload bay to the port side of the Harmony connecting node at the station. (Xinhua/AFP Photo)