An anonymous reader writes with a report from CNN that U.S. and UK intelligence agencies believe it is more likely than not that the destruction on October 31st of a Russian A321 jetliner in Sinai "was most likely caused by a bomb on the plane planted by ISIS or an affiliate of the group." Kogalymavia Flight 9268 fell apart in flight, killing all aboard. From CNN's article: The British government announced Wednesday that it had "become concerned that the plane may well have been brought down by an explosive device." A formal conclusion has not been reached by the intelligence communities of either country. An UK aviation team is travelling to inspect the Sharm airport to look at whether there were proper security measures at the airport and the various scenarios by which an explosive device could have made it to the Russian airliner "including a person or in cargo," according to the British transport minister. Both Russian and Egyptian officials discount the claim, but detecting bombs is hard.