escalation. something after the chatter that led to the threat and warnings about sunday that prompted 22 diplomats around the world to be closed. the focus is on yemen. a few al qaeda operatives are moved into sunni at the moment. fears of that message to do something may be activating some kind of plot. >> it's surprising that these two senior al qaeda people were talking to each over. they must know they're being listened to. is that an indication perhaps of better surveillance techniques or they lapsed a little bit? >> reporter: in many ways it's extraordinary. the man who succeeded bin laden to keep himself away from american surveillance was foolish enough or unware of how great in advance american surveillance has taken on that