SpaceX rocket launch

SpaceX
The SpaceX Falcon 9 rocket remains standing on Launch Complex 40 at Cape Canaveral Air Force Station in Florida following a test firing of the vehicle's nine Merlin first-stage engines. (NASA/Jim Grossmann)

SpaceX says it looks like an engine problem with its orbiting Dragon capsule has been fixed but its arrival at the International Space Station will be delayed. The private spacecraft ran into trouble with its thrusters shortly after liftoff March 1.