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Kurdish security forces take up a position as they fight overlooking the Islamic State-controlled in villages surrounding Mosul, in Khazer, about 30 kilometers (19 miles) east of Mosul, Iraq, Monday, Oct. 17, 2016. Iraqi government and Kurdish forces, backed by U.S.-led coalition air and ground support, launched coordinated military operations early on Monday as the long-awaited fight to wrest the northern city of Mosul from Islamic State fighters got underway.(AP Photo)
Kurdish security forces take up a position as they fight overlooking the Islamic State-controlled in villages surrounding Mosul, in Khazer, about 30 kilometers (19 miles) east of Mosul, Iraq, Monday, Oct. 17, 2016. Iraqi government and Kurdish forces, backed by U.S.-led coalition air and ground support, launched coordinated military operations early on Monday as the long-awaited fight to wrest the northern city of Mosul from Islamic State fighters got underway.(AP Photo)

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Mosul timeline: When can it be recaptured from ISIS?

ISIS continues to resist, even using civilians as human shields. CNN's Ben Wedeman reports.

Mosul timeline: When can it be recaptured from ISIS?

ISIS continues to resist, even using civilians as human shields. CNN's Ben Wedeman reports.