Some call it "Russia's 9-11." The siege of School No. 1 in the Russian town of Beslan on September 1, 2004 was the bloodiest act of terrorism in Russia since Chechnya declared independence in 1991. As the trial of the only terrorist who survived the siege begins, this wrenching film examines the three-day ordeal that saw Chechen gunmen hold more than 1,000 hostages, most of them children.