The Falcon 9 SpaceX rocket stands ready for launch on complex 40 at the Cape Canaveral Air Force Station in Cape Canaveral, Fla., Friday, Jan. 9, 2015. (Associated Press)
A SpaceX rocket has blasted off with supplies for the International Space Station. And the company is on course to attempt an unprecedented landing on an ocean barge with the leftover booster.
The unmanned Falcon rocket soared into a clear pre-dawn sky at Cape Canaveral, Florida, on Saturday.
The primary mission for SpaceX is delivering more than 5,000 pounds (2,300 kilograms) of food, experiments and other items ordered up by NASA. The California-based company led by billionaire Elon Musk will attempt an even more extraordinary feat once the Dragon launches: flying the booster rocket to a platform floating a couple hundred miles off Florida's northeastern coast. A vertical touchdown is the goal.
It's the second try this week by SpaceX to launch its Dragon cargo ship. Rocket trouble halted on Tuesday's countdown.