The US killing of Iranian military leader Qassem Soleimani near Baghdad has put the spotlight on Iran's involvement in Iraq, in particular its support for Shia militias, or Popular Mobilisation Forces. They played a key role in defeating Islamic State, but their continued presence poses a serious challenge to the Iraqi authorities. Alaco's Head of Content Yigal Chazan and Middle East analyst Kavar Kurda discuss concerns over the militants.