VATICAN CITY (AP) — Revelations that a prominent U.S. cardinal sexually abused and harassed his adult seminarians have exposed an egregious abuse of power that has shocked Catholics on both sides of the Atlantic. But the Vatican has long been aware of its heterosexual equivalent — the sexual abuse of nuns by priests and bishops — and done little to stop it, an Associated Press analysis has found. An examination by the AP shows that cases of abused nuns have emerged in Europe, Africa, South America and Asia, demonstrating that the problem is global and pervasive, thanks to the sisters' second-class status in the church and their ingrained subservience to the men who run it.