ELDORADO, TEX. — The Yearning For Zion ranch a few miles west of nowhere was built to keep the secrets of the Fundamentalist Church of Jesus Christ of Latter Day Saints hidden from prying eyes. But the church's days of splendid isolation and impenetrable secrecy – only the top fringe of the temple's white limestone walls visible from a distant rural road at the edge of the 1,700-acre spread – are rapidly ending. The Texas Rangers raid of the secluded ranch in early April led to sensational allegations of grooming underage girls for marriage and sexual abuse. And the discovery...