Friday marks third anniversary of assassination of Osama bin Laden in Pakistan by U.S. forces . Al Qaeda is depleted , but danger of home-grown terror on rise , writes Andrew Hammond . TL;DR NEW: And given that the relatively large number of these foreign fighters makes them collectively difficult to track with precision , further home-grown attacks appear increasingly likely . Al Qaeda franchises now focus more on `` local '' issues , Hammond says , threatening Western security .
Friday marks third anniversary of assassination of Osama bin Laden in Pakistan by U.S. forces . Al Qaeda is depleted , but danger of home-grown terror on rise , writes Andrew Hammond . TL;DR NEW: Al Qaeda franchises now focus more on `` local '' issues , Hammond says , threatening Western security .