What a Ramadi victory means for the fight against ISIS

The Iraqi military has been preparing for months to recapture Ramadi from the Islamic State group. As tanks and other vehicles rolled through the streets, state television reported the army chief has said his forces will finish taking back the vital city in the coming days. Gwen Ifill talks to Ayman Oghanna of VICE News and retired Army Col. Peter Mansoor about the significance of the battle.