Retired General Petraeus on the timeline for retaking Iraq from IS

The Iraqi army and its allies are moving to the ISIS-held city of Fallujah. New video shows government troops on their way to the last ISIS stronghold in western Iraq. Officials say the civilian presence is slowing the offensive by limiting the use of air strikes. Retired General David Petraeus attended Charlie CBS’s PBS program Thursday night to discuss Iraq and a timetable for retaking ISIS-held cities.