PLEASE NOTE: CONTAINS CONVERTED 4:3 MATERIAL<br/> <br />Astronauts at the International Space Station (ISS) say goodbye, as three crew members board a capsule for the journey back to Earth.<br/> <br />Sunita Williams of the United States was one of three members of the Expedition 33 crew, who spent 125 days aboard the space station.<br/> <br />They conducted several experiments during their visit, including tests on radiation.<br/> <br />As the hatch closed on the Russian-built Soyuz capsule, the astronauts began their journey home.<br/> <br />Back on Earth, they landed safely in Kazakhstan, where a recovery team helped extract the astronauts one by one.<br/> <br />Command of the space station has been handed to NASA astronaut Kevin Ford.<br/> <br />He and two other crew members will be joined by another group of astronauts on December 15th.<br/> <br />The International Space Station is a multi-billion dollar research complex, involving 15 countries from around the world.
