much. just a couple of days ago a lawmaker called the tsa pitiful because of the sheer number of guns and fake bombs that slipped past security during covert testing. now the possibility that someone working at the airport in sharm el sheikh in egypt, a so-called insider, planted a real bomb, has security experts worried that all the body scanners and wands and metal detectors and shoe removals in the world will not be able to stop the next attack. cnn aviation correspondent rene marsh joins me now. rene, was this a security lapse from the back of the airport so to speak. is this unique to egypt, to sinai? or is this something that could happen here in the u.s.? >> i've been speaking to a lot of people today past and present in the aviation security sector. if indeed a bomb brought down this russian airliner, some say there are vulnerabilities here in the u.s. security system that could make it possible for a