By Jim Mustian, Associated Press - The FBI has opened a widening investigation into sex abuse in the Roman Catholic Church in New Orleans going back decades, a rare federal foray into such cases looking specifically at whether priests took children across state lines to molest them... Some of the New Orleans cases under review allege abuse by clergy during trips to Mississippi camps or amusement parks in Texas and Florida. And while some claims are decades old, Mann Act violations notably have no statute of limitations.