>> reporter: well, don, the signals as you described were first announced by xinhua state media, also chinese state television. they have reporters onboard that coast guard cutter which has a device that has been testing for pulse signals. they say they heard a signal for at least a minute in an area outside of the officially designated search area. some questions being asked why did we learn about this from state media? why wasn't an official announcement through the chain of command? it does appear that the chinese search teams talked directly be here in beijing before they move information on. so a little bit of friction, potentially, but pretty quickly after that initial announcement, there were more announcements by government sources here in china saying, you know, no concrete evidence yet that this is linked to flight mh-370. so pretty quickly they dialed back on that initial report.