Ita Ford was a Brooklyn-born nun working in violent, impoverished El Salvador. Her older brother, Bill Ford, was living a very different life in 1980, practicing law on Wall Street and raising a family in Montclair. "I wasn't really thinking about Central America at all," he said. That changed in an instant. Ford was at home, enjoying his newborn sixth child, in early December when a telephone call from the Maryknoll Sisters, his sister's order, changed his life. Ita Ford was among four American Catholic churchwomen missing in El Salvador. Within minutes, he was on the phone with the U.S....