Resurgent violence underscores morphing of al Qaeda threat

WASHINGTON/ISLAMABAD (Reuters) - - In Iraq, an al Qaeda splinter group is threatening Baghdad after seizing control of two cities. In Pakistan, the Taliban attacked a major airport twice in one week. And in Nigeria, the Islamist militant group Boko Haram was blamed for another mass kidnapping.

A cluster of militant attacks over the past week is a reminder of how the once-singular threat of al Qaeda has changed since the killing of Osama bin Laden, morphing or splintering into smaller, largely autonomous Islamist factions that in some cases are now overshadowing the parent group.