This summer, Iraqis can perhaps see a glimmer of light amid the darkness that's enveloped their country for so long. The country's second city, Mosul, is no longer in the hands of jihadist fanatics, with the so-called Islamic State caliphate shrinking fast. But will any semblance of stability and unity follow? HARDtalk’s Stephen Sackur speaks to one of the great survivors of Iraqi politics, Vice President Ayad Allawi. Does he think Iraq has a viable future?