following a senior u.s. air safety investigator will help the chinese government try and determine why a china eastern airlines flight crashed on monday. the boeing jet carrying 132 people lost contact before falling thousands of meters over the city. so far, no survivors have been found. according to chinese state media. cnn joins me now from beijing. with more on this. steven, video of this plane going down is chilling. and we don't know why it suddenly fell out of the sky. what's the latest on the investigation and of course help that is apparently on the way? >> the chinese investigators dozens of them on the scene. face the daunting task of locating and identifying and collecting a lot of pieces and debris of this aircraft. now as you can imagine they're most important and urgent task