Pope Francis, center, Enrique Pena Nieto, Mexico's president, right, and Pena Nieto's wife, Angelica Rivera, left, stand during the welcoming ceremony at The National Palace in Mexico City, Mexico on Saturday, Feb. 13, 2016. Pope Francis is scheduled to celebrate mass at the Basilica of Guadalupe on Saturday night during his trip to Mexico which runs through Wednesday. Photographer: Susana Gonzalez/Bloomberg via Getty Images