On 8 September, the Moria refugee camp on the Greek island of Lesbos went up in flames. More than 12,000 migrants, already living in dire conditions, were burned out of their tents. The Greek authorities have blamed the blaze on a small number of camp residents, but among the refugees themselves, many say local far-right activists started the fire.On both sides, there were people who wanted the camp gone. So who torched Europe's largest refugee camp? With the help of a group of young refugee film-makers and exclusive access to a massive archive of footage from the fire and its aftermath, Gabriel Gatehouse investigates the events surrounding the blaze and the roots of Europe's dysfunctional migration policy.