groups? take the i.r.a. as an example. >> al qaeda operates globally and many, many ways it's difficult. it's not so much a cell structure, it's a country structure. you have disparate groups, but each will operator in a country, say for example yemen. and they will ally themselves with the al qaeda command and claim allegiance and claim allegiance to al qaeda. they operator under its umbrella. but they don't have a direct contact with another group say in algeria. if you do attack the yemeni group, that doesn't mean you're going to be able to roll up over groups. it's one of the things that has made them different. to investigate and prosecute. but they do share many similarities. they are a group that are motived by what they see as an injustice. and they've been very motivated by the religious aspect which is draw young men from around the world to the banner of al qaeda, and also very much to osama bin laden as an individual. he was a legend.