Inside Story: Can Shia Militias Be Integrated into the Iraqi Army?

Though they've been accused of widespread human rights abuses, the Popular Mobilisation Units or Shia militias, have become a crucial part of the Iraqi government's anti-ISIL staratgey. Now Prime Minister Haider al-Abadi wants to integrate them into the national armed forces. But can the state control them? And where do their loyalties lie?