think back to a number of somali youth who ended up going to somalia. if memory serves me, the first suicide bombing in somalia several years ago was actually an american. >> yeah. i mean, i think, you know, the -- the kind of conventional wisdom is that americans would never engage in suicide operations, as you point out, anderson. there's now been three cases of american committing suicide in somalia. once you have americans committing suicide overseas in a way kind of a big barrier is breached. we saw british citizens conduct suicide operations overseas, and then we saw them attack in london in 2005. and i think one of the questions for investigators here is the extent to which these two brothers went into this knowing that they would die. you know, in a way, they were able to extend this series of attacks by not conducting a conventional suicide operation. in a sense like the mumbai attacks where the attackers went in knowing that eventually they would die. but spreading out the whole event over three days. i think that's the kind of thing that we've seen in boston,