A chilling new report by Amnesty International exposes the Syrian government’s calculated campaign of extrajudicial executions by mass hangings at Saydnaya Prison. Between 2011 and 2015, every week and often twice a week, groups of up to 50 people were taken out of their prison cells and hanged to death. In five years, as many as 13,000 people, most of them civilians believed to be opposed to the government, were hanged in secret at Saydnaya.