All evening May 21, the day Mahtab Mortezaei Farid graduated from George Mason University, she waited for her phone to ring. Her father, in Tehran and too far away to attend, had promised to call after her ceremony. For a man who had devoted much of his life to educating young people, the education of his daughter carried special meaning. A few days earlier, when they had last spoken, “he was excited, and he made me promise to send pictures,” she said. But the call never came, and Mortezaei Farid, 26, figured her father had forgotten. The next morning, she learned from Bahai friends in Iran what had happened: At the moment her father was supposed to be calling, he was being arrested.