Pope Benedict XVI will use his trip to America next month to present Catholic educators with a powerful challenge, one whose effects could ripple from Notre Dame, Ind., to Tarrytown, N.Y., prominent Vatican watchers are predicting. The expected message: Become more Catholic, or else.In one of just a few major addresses planned for his six-day visit to America, Pope Benedict is scheduled to speak about education at the Catholic University of America in Washington, D.C., before an audience that should include the president of every Catholic college and university in the country, plus representatives from every archdiocese, which oversee Catholic...