U.S investigators believe that the missing Malaysian Airlines Flight 370 communication system were shut off manually and that the plane flew for at least 5 more hours after it dropped off the radar based on analysis of signals sent by the jet's satellite communication link.
U.S counterterrorism officials are pursuing the possibility that a pilot or someone else on board the plane may have diverted it toward an undisclosed location after intentionally turning off the jetliner's transponders to avoid radar detection, according to one person tracking the probe.
