Boko Haram still a threat months after 'technical victory'

Here on the front line against Boko Haram, no one boasts of having "technically" won the war. More than four months after Nigerian President Muhammadu Buhari made such a claim, the extremists still crisscross international borders, avoiding direct confrontations with U.S.-backed African forces while refocusing on soft targets like marketplaces and mosques with little to no protection. The group may be gone from major cities, but in the countryside it poses a constant threat. And for the hundreds of thousands of refugees and impoverished villagers surrounded by fighting in the isolated northern reaches of Cameroon, terror and hunger form daily challenges to their survival.U.S. Ambassador to...