certain, that's how sure a senior u.s. official is that isis snuck that bomb onto that russian passenger jet taking the plane out and with it 224 people including 25 children. the official line from the egyptians, confusingly remains the same. they say that it is still too soon to definitively say just what caused this plane to fall out of the sky. cnn chief national security correspondent jim sciutto is in washington and will help us clear this all up. jim, why such a disconnect between what u.s. and british and israeli officials are saying and the public statements of the russians and especially the egyptians? >> i'll tell you, there's so many politics swirling around here. really the last thing you want in any sort of terrorism or possible terrorism investigation, you now actually have the russian prime minister dmit dmit dmitri saying all flights to egypt have been suspended since