Iraq facing its biggest crisis since US forces withdrew in 2011 - a crisis that could lead to a civil war. Al Jazeera's Omar Saleh reports from Baghdad. Subscribe to our channel http://bit.ly/AJSubscribe Follow us on Twitter https://twitter.com/AJEnglish Find us on Facebook https://www.facebook.com/aljazeera Check our website: http://www.aljazeera.com
