The first line of his first blog from Tehran in September 2006 asks: “What is freedom?” Omidreza Mirsayafi answered his own question. “I don’t know,” he wrote, “but I know someday I will see its shadow falling on my land.” Two and half years later, from behind the gray walls of Tehran’s Evin Prison, he phoned his mother. They talked about his battle with depression behind bars. She asked if he was taking his heart medicine. A few hours later, on a chilly mid-March evening, the 29-year-old Mirsayafi was dead.