CAPE CANAVERAL, Florida, Nov 4: Virginia-based Orbital Sciences Corp completed a successful test mission at the International Space Station on Tuesday, clearing the firm to begin regular cargo runs for NASA under a $1.9 billion contract. Using the space station’s robotic arm, astronauts aboard the station plucked the Orbital Sciences’ Cygnus capsule from its docking port and released the unmanned capsule into space as the two sailed high over the Atlantic Ocean. (agencies)