NEW ORLEANS (AP) — 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, officials and others familiar with the inquiry told The Associated Press. More than a dozen alleged abuse victims have been interviewed this year as part of the probe that’s exploring among other charges whether predator priests can be prosecuted under the Mann Act, a more than century-old, anti-sex trafficking law that prohibits taking anyone across...