WSJ has confirmed that the pilot had the ability to manually turn off the transponder on Flight MH370. Why is the transponder so significant? WSJ's Jason Bellini has #TheShortAnswer.
WSJ's Andy Pasztor has been reporting on Flight MH370 since it disappeared. Here he explains how a plane can still transmit "pings" that allow investigators to track it even after its main tracking systems ― or transponders ― are shut off.
Former FBI agent Chris Voss joins the News Hub to discuss U.S. investigators' suspicions that Malaysia Airlines Flight 370 stayed in the air for four hours after vanishing from civilian air-traffic control radar.