Waad and Hamza al-Kateab are two Syrian refugees who risked everything to stay in Aleppo during the war. Waad is an award-winning film-maker, whose documentary ‘For Sama’ just won Best Documentary at Cannes. It tells the intimate and epic journey of her experience of war. Her husband Hamza is a doctor and ran a hospital in eastern Aleppo. They talk to Krishnan ahead of their film's premiere at the Sheffield Doc Fest on 8th June. It will be shown on Channel 4 and released in theatres later this year.