Iraq's largest loss to the Islamic State group is Mosul, the country's second biggest city. Iraqi Kurdish forces, backed by US air strikes, appear to be advancing in their bid to retake the city from Islamic State fighters. Al Jazeera's John Hendren reports from Mount Zirtec in Iraq. 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/