The Islamic State, despite being driven by Kurdish fighters from its one-time Syrian stronghold in Kobani last week, nevertheless is extending its reach well beyond Iraq and Syria, military officials and analysts warn -- represented, by some estimates, in nearly a dozen countries. Lt. Gen. Vincent Stewart, director of the Defense Intelligence Agency, delivered a grim assessment earlier this week in testimony to the House Armed Services Committee, as he described how the group was surfacing in North Africa. "With affiliates in Algeria, Egypt, Libya, the group is beginning to assemble a growing international footprint that includes ungoverned and under...