Note today, president obama weighed in on the suspicion that a bomb brought down that russian jet liner over the weekend. More than 200 people were killed. David martin has the latest. Reporter in his first Public Comment about the crash, president obama told a radio interviewer, it could have been terrorism. I think there is a possibility that there was a bomb. On board. And were taking that very seriously. Reporter the president stressed there is as of yet, no firm evidence. Nothing from the flight data recorders and nothing from the wreckage to confirm the bomb theory. Its based on heat flashes detected by the u. S. Satellite at the time the plane went down. One flash followed by three more as it fell to earth. Theyre consistent with a explosion but do not identify the cause. Isis has claimed responsibility without proof to back up the claim. United states has intercepted members talking about it like they did it but it could just be bogus bragging. U. S. Intelligence now agrees wit