debris. >> thanks very much, kyung lah. that's it for "the lead." i'm jim sciutto. i'll send you over to wolf blitzer who is in "the situation room." >> jim, thanks very much. happening now, the mystery of flight 370. aircraft are getting ready to take off and ships are getting back into the area after violent weather in the search area. time is running out to find the so-called black boxes. the u.s. sent down a pinger locator to help find the flight and data recorders. you're going to see how it works. and grieving and the furious. hundreds of the friends and passengers are demanding firm evidence that their loved ones are lost forever. so why is china now starting its own investigation?