Among Al-Qaeda's affiliates, the group's branch in Yemen posed the greatest danger to the US
A militant suspected of being a member of Al-Qaeda sits at a checkpoint in Azan in the southern Yemeni province of Shabwa, March 31. Nearly a year after a US raid killed Osama bin Laden, his core Al-Qaeda network in Pakistan is "essentially gone" but its affiliates remain a threat, US intelligence officials said.