to be seen domestically by its own people as doing its utmost to find out what happened to this plane to give closure to their families. >> that last point there is one that all of the experts i spoke with today stress to me. whatever doubts people might have about the strength of the evidence china's provided when it's come to these pulses or pings, whatever conspiracy theories may be out there, the bottom line is that it's in china's interest to do everything it can to help find this plane. that's what these experts say china is doing. >> thanks, very much. let's bring in richard quest right now, joining us from new york. very quickly, richard, what do you make of the chinese single pulse signal? are you giving that any credence? >> no, frankly. the only reason i'm not giving it any credence any more is the experts privately will tell you it's technically possible that it picked it up, but not one of the experts i've spoken to who know about this and look into