Father Federico Lombardi (left), the Vatican's spokesman, and Vatican communications adviser Greg Burke present Pope Benedict XVI's Twitter Web page (top right) to journalists at the Vatican Press Hall on Monday, Dec. 3, 2012. (AP Photo/Gregorio Borgia)

Photo by: Gregorio Borgia

Father Federico Lombardi (left), the Vatican's spokesman, and Vatican communications adviser Greg Burke present Pope Benedict XVI's Twitter Web page (top right) to journalists at the Vatican Press Hall on Monday, Dec. 3, 2012. (AP Photo/Gregorio Borgia)