NINEVEH, IRAQ - JANUARY 28:  A checkpoint displaying a flag of the Imam Hussein, the Shia prophet, run by the Shabak Unit of the Hashid Al-Shaabi (predominantly Shia mobilisation forces) in Bartella, Nineveh, northern Iraq, on January 28, 2017. The Shabak are a persecuted minority in Iraq and were directly targeted for killings and abductions by Islamic State.  The liberation of eastern Mosul was confirmed by The Iraqi Prime Minister Haider al-Abadi.  (Photo by Martyn Aim/Corbis via Getty Images)