crusading force backed by the united states. so shabaab started to get street credibility within somalia because they were the only ones fighting. the rest of the networks had been disrupted, co-opted, killed or imprisoned by the americans or ethiopians. so, what happened at the end of the day is that al qaeda was able to get a foothold in somalia, and it had never been able to before. bin laden desperately wanted to get into somalia and somalis rejected him. the u.s. invasion with ethiopia opened the door and shabaab has gotten increasing ly militant as the years have gone on. >> and they clearly seem to have an agenda if, in fact, this is somali al shabaab fighters behind this. why would they attack a kenyan mall? >> well, there's a long history of al qaeda in east africa and then eventually al shabaab staging attacks in kenya and elsewhere in africa. >> of course, the embassy bombings. >> yes, in '98 in tanzania and kenya, but there was also a 2002 attempt to shoot down israeli aircraft in mombasa. then you had the bombing at the world cup in 2010 in uganda, an american citizen was killed in that, as well as a number of ugandans. and i think that, you know, if you look at the past two years, kenya has been deeply involved