and security equipment from airports, they could help refine their bomb making techniques to ensure that they can come up with something that could make it through the security screening process. that's really what's elevated this concern and how prompt this ban. we have seen in somalia last year of a laptop was used to carry a bomb to board the plane. the plane suffered some damage but was able to land. it is a tactic that's been used before. with the new equipment, they're refining the process coming up with a great bond and make through security checks. >> what do you know about that. how sophisticated are the bomb s s? >> it is sophisticated. al-qaida and yemen, they long been, they have sophisticated bomb makers and they perfected