Late on an August night in 2013, Tania Joya found herself stranded with her husband and three young sons in a Turkish city not far from the border with Syria. The hotels were jammed with refugees, and the family had nowhere to go. Her husband, a convert to Islam, was a Texan, from Plano. Tania, who had been raised outside of London, had been married to him for ten years. They had most recently been living in Egypt but had been forced to flee that country amid the chaos that followed the 2013 ouster of the Muslim Brotherhood–led government. They’d headed for the eastern Turkish city of Gaziantep, about thirty miles from the Syrian border, where people spoke Arabic and her husband could find work. He was a jihadist—soon to become one of the most senior Westerners in ISIS—who dreamed of helping form a caliphate, an Islamic kingdom to rule the world. She was growing increasingly disenchanted with his quest.