(Yahoo News) – The latest in a series of ISIS propaganda videos showcasing child soldiers has been released, and the details are chilling: It depicts recruits as young as 5 going through drills at a military training camp for “cubs” in Syria. “They taught us how to slit throats and how to blow ourselves up,” a 15-year-old boy who escaped the school tells Reuters. He and his brother, 11, spent seven months in training before managing to get away; their Yazidi (a Kurdish religious community) family had been taken captive by the Islamic state and forced to convert to Islam when their Iraq town was captured by militants.