A Soyuz capsule carrying three astronauts successfully docked Friday with the International Space Station, bringing the size of the crew at the orbiting lab to six. Chris Cassidy of the United States and Russians Pavel Vinogradov and Alexander Misurkin traveled six hours in the capsule before linking up with the space station's Russian Rassvet research module over the Pacific Ocean, just off Peru, at 02:28 GMT, AP reported.