The Pentagon has said a US air strike killed Islamic State terror group strategist Abu Muhammad al-Adnani. The August 30 air strike near Al Bab in Syria, was conducted by a Predator drone, which fired a Hellfire missile at the car Adnani was traveling in. <br/><br/>Adnani was one of the IS group's most high profile figures, with a 5 million dollars bounty on his head.