BREAKING: Boko Haram leader pledges allegiance to ISIS

March 7, 2015       BREAKING NEWS BREAKING: Boko Haram leader pledges allegiance to ISIS This is a developing story and we expect to have more information soon. Go toNBCNews.com for further developments.     Keep Reading             For Breaking News, the moment it happens, follow @NBCNEWS Follow @NBCNEWS     More Top Stories     Black Teen Shot Dead by Wisconsin Cop, Sparking Protests > 50 Years Later, Selma Marches Slowly Toward Change > The Week in Pictures > Everything You Need to Know About Daylight Saving Time > ISIS Starts to Dismantle Ancient Iraqi Archaeological Site >