this aircraft and aircraft that was not showing a transponder signal. that led them to believe it is the malaysian airlines aircraft. they believe it's on the bottom of the ocean now. what is the latest? the u.s. navy airplane has now completed its first sweep 1,000 miles to the east. it reports finding nothing. the u.s. destroyer also there. its helicopters will fly all of the u.s. attention now focused on this area of the indian ocean east of malaysia. chris? >> thank you very much for the reporting. we're chasing down all these different threads. it certainly doesn't make it easier for the families waiting for answers. they deserve it most of all. paulene is in beijing where the flight was headed.