SpaceX aborts launch after 'odd' rocket engine behavior

SpaceX aborted its planned Dragon cargo launch to the International Space Station just seconds before liftoff Saturday due to a "slightly odd" technical issue with the Falcon 9 rocket engine.The delay was made "out of an abundance of caution," a SpaceX spokesman said, and came a day after engineers discovered a small helium leak in the engine's second stage."All systems go, except the movement trace of an upper stage engine steering hydraulic piston was slightly odd," SpaceX chief executive offi