Ahmad Abdi Godane, the late leader of Somalian militant Islamist group al-Shabaab, was killed in a U.S. air strike, both the Pentagon and Somalia’s premier confirmed on Friday. The demise of the reclusive leader—of whom very few confirmed photos exist—was hailed by the White House as “a major symbolic and operational loss” for the al-Qaeda linked group. Due to al-Shabaab’s activities under Godane’s leadership and his allegiance to al-Qaeda, the U.S. State Department had listed him as one of the world’s eight top terror fugitives, with a $7 million reward for information leading to his arrest, the third-highest level of...