did a major about-face suspending all air traffic after intelligence was shared with him from the u.s. and uk. matthew chance is "outfront" from moscow. matthew, for russians to do an about-face, we were just talking about this with the formatter cia operative phil mudd. this must be very clear and a big deal, this intelligence. >> yeah, absolutely. american and british intelligence according to the kremlin official i spoke to earlier on this evening. clearly it was enough, big enough, for them to do an about-face like you say, but also to ban flights, not just from the sinai peninsula or shafrm el shake but from the whole of egypt. they suspended all air operations to and from egypt. it gives the suggestion that there is the possibility of a continued threat towarrussian airliners from that country. so they're going to be embarking on a process now they've probably already started of narrowing the threat down and do a proper risk assessment to get the flights back running again.