All roads lead to the Russians to some degree," said the U.S. official.The least likely possibility, based on the U.S. analysis, is that the Ukrainian military somehow shot down the plane. "It is very unlikely," the official said. "The only groups we are looking at are the separatists or the Russians."http://online.wsj.com/articles/u-s-intelligence-confirms-likely-shoot-down-of-malaysia-jetliner-1405633911?tesla=y&mg=reno64-wsj&url=http://online.wsj.com/article/SB10001424052702304223004580035751393766206.html