>> good afternoon, jim. i initially had a theory myself that something happened that was immediate -- required immediate attenti attention. the whole concept of acars reporting information contrary to that sort of dashed that theory. we're back to the point where the pilots easily could have been dealing with an internal problem or had a gun to their head. they can't really say. but the fact that it would be premeditated would take away all those other scenarios. so acars is doing its normal job, they have normal communication, they have normal acars reporting, and then a line is drawn and things change drastically. we have to look at what things could cause the pilot, for instance, to turn back. and a pilot would turn back if he -- his plane is in trouble. and that's why he wouldn't descend and land. there are other issues. every theory as holes in it. we don't have enough information to make a complete picture. but the fact that akors and prepamming of the flight management system didn't occur prior to this line being drawn leaves open the option that the