Pope Francis pushes open the Holy Door of St. Peter's Basilica, formally launching the Holy Year of Mercy, at the Vatican, Tuesday, Dec. 8, 2015. Francis stood in prayer on the threshold of the basilica's Holy Door then walked through it, the first of an estimated 10 million faithful who will pass through over the course of the next year in a rite of pilgrimage dating back centuries. (L'Osservatore Romano/Pool Photo via AP)