Audio message was released online recent years and speaker is said to be Boko Haram leader . Expert says partnership will have benefits for both groups , including giving ISIS international legitimacy . But U.S. intelligence officials have indicated their doubts they groups would work well as partners .
Audio message was released online Saturday and speaker is said to be Boko Haram leader . Expert says partnership will have benefits for both groups , including giving ISIS international legitimacy . But U.S. intelligence officials have indicated their doubts they groups would work well as partners .