The children had all been shown videos of beheadings and told by their trainers with the Islamic State group that they would perform one someday. First, they had to practice technique. The more than 120 boys were each given a doll and a sword and told, cut off its head. A 14-year-old who was among the boys, all abducted from Iraq’s Yazidi religious minority, said he couldn’t cut it right. He chopped once, twice, three times. “Then they taught me how to hold the sword, and they told me how to hit. They told me it was the head of the infidels,” the boy, renamed Yahya by his IS captors, told The Associated Press last week in northern Iraq, where he fled after escaping the IS training camp.