International Business Times Peter Kassig beheading: Academics ‘prove’ executions do not help terror groups achieve aims As the world reels from the brutal execution of aid worker Peter Kassig by knife-wielding Isis (Islamic State) militants, academics claim they have uncovered proof that executing hostages does not help terror groups achieve their aims. Max Abrahms of Northeastern University and Matthew S Gottfried of UCLA argue that an analysis of thousands of hostage […]