Smoke billows as militants loyal to Yemen’s fugitive former president, Abd Rabbuh Mansur Hadi, clash with Houthi Ansarullah fighters in the Khor Maksar neighborhood of the southern port city of Aden on May 3, 2015. Yemeni army soldiers backed by members of the Popular Committees have managed to foil an attack launched by Saudi naval forces on Yemen’s strategic port city of Aden in the south. Local...