SpaceX preps Falcon 9 for space station supply run with robot aboard

A SpaceX Falcon 9 rocket was prepped for for a pre-dawn launch Friday to carry nearly 6,000 pounds of equipment, supplies and science gear to the International Space Station. Its payload includes a basketball-size robot using IBM's Watson artificial intelligence technology that will act as an astronaut assistant.Liftoff from pad 40 at the Cape Canaveral Air Force Station is targeted for 5:42 a.m. EDT (GMT-4), roughly the moment Earth's rotation carries the pad into the plane of the space station