pointing towards an insider at the airport inciting a device on the plane. you do have to match those up with what you're hearing on the black box. the forensics, whether they are seeing the telltale signs of an explosion in the wreckage and whether there's bomb residue from explosive trace detection steps. we haven't had had those results in yet. the russians have been promising in the next 24 to 48 hours they may have some results. everybody will be keenly awaiting that. the idea that c4 may be involved, it's relatively difficult to get it. and it's an organized terrorist group responsible if it was a bomb that took down this it airliner. >> as you sort of fits the template for what terrorists in that area have been using for explosives. david, tell us, a lot of people look at what happened here and