conversations with the cockpit and no data there. someone likely reprogrammed the plane's cockpit computer to veer off course. how do investigators know that? "the new york times" reports that flight 370 reported the change through the aircraft communications addressing and reporting system, which you probably know now as acars. let's bring in our aviation correspondent rene marsh. what are you hearing? >> well, jake, there is so much confusion over what all of these communications systems that this aircraft had. i'm told by officials that they have gotten this data that at some point someone changed the program of where this aircraft was headed and put in