SpaceX Dragon departs space station, heads home with cargo

A SpaceX capsule is headed back to Earth with precious science samples from NASA's one-year space station resident. The Dragon left the International Space Station in the morning, bound for an afternoon splashdown in the Pacific, a few hundred miles off the Southern California coast. The station's big robot arm set the Dragon free over Australia. The commercial cargo craft has been packed with about 3,700 pounds of cargo, spacewalk gear and biological samples for analysis on Earth. They include blood and urine samples from astronaut Scott Kelly's one-year mission. Kelly returned to Earth in March and has since retired from NASA.