but this would turbo charge isis's popularity in the global jihadi movement, increase their standing. there's so much anger right now in the sunni muslim world against the russians. it's also targeting an aircraft, so it's a spectacular attack, which will hurt the egyptian economy, lead to more unemployment, lead to more fertile environment for terrorists recruitment. all sorts of reasons why this is a significant event. and may lead to geopolitical reverberations. russia may play a bigger role in the syria intervention, may pivot towards striking isis. that could play into isis's hands. you can see even more foreign fighters going to syria. >> so, bob, the united states and britain say it was likely an isis bomb attack. that's where they're leaning right now. egypt and russia say, no, not so fast. we don't buy it. is this a case of not believing that it was a bomb attack or not