The US space shuttle Atlantis ended a two-day journey to the International Space Station on Sunday, slipping into a berthing port to deliver more solar-powered panels and a new crew member to the orbital outpost. Docking was at 3:36 pm EDT as the two craft sailed 354 km over the western Pacific Ocean. "Atlantis arriving," Williams sang out as her NASA colleagues scrambled aboard, beginning what is expected to be a week-long joint mission.