text: Pope Benedict XVI gives Communion to Miguel Diaz, then-U.S. ambassador to the Vatican, during a 2010 Mass in St. Peter's Basilica at the Vatican. Diaz, who stepped down in November after nearly four years as ambassador, said he and the pope bonded over t he fact they are both theologians. The 85-year-old pope announced Feb. 11 that he will resign at the end of the month. (CNS photo/Paul Haring