Altar girls protect themselves against the cold with rescue blankets as they walk to a mass with Pope Benedict XVI in Freiburg, southwestern Germany. (AP Photo/Matthias Schrader)
Pilgrims walk to a mass with Pope Benedict XVI on the tarmac of the airport in Freiburg, southwestern Germany. (AP Photo/Matthias Schrader)
Pope Benedict XVI arrives for a meeting with Catholics involved in the Church and society, at the concert hall in Freiburg, southern Germany, Sunday, Sept. 25, 2011, the last day of his four-day official visit to Germany. (AP Photo/Miro Kuzmanovic, pool)
Pope Benedict XVI touches a baby as he drives through the crowd in his popemobile before celebrating Mass in Freiburg, Germany, on Sunday, Sept. 25, 2011, the last day of a four-day visit to his homeland of Germany. (AP Photo/Michael Probst)
Pope Benedict XVI arrives in his popemobile to celebrate an open air mass in front of the St. Mary's cathedral in Erfurt, central Germany, Saturday, Sept. 24, 2011. Pope Benedict XVI is on a four-day official visit to his homeland Germany. (AP Photo/Jens Meyer)
ASSOCIATED PRESS German President Christian Wulff and Chancellor Angela Merkel welcome Pope Benedict XVI at Berlin's airport on Thursday, the start of a four-day visit.
In anticipation of Pope Benedict XVI's visit to his German homeland, the tabloid Bild Zeitung has covered its headquarters in Berlin with a giant reprint of its front page of April 20, 2005, when Benedict was elected. The headline reads, "We Are Pope!" (AP Photo/Markus Schreiber)
Associated Press Pope Benedict XVI serves Communion to a girl wearing a T-shirt bearing his name while celebrating Mass at Cuatro Vientos airfield outside Madrid on Sunday. The pope was in Madrid for the four-day World Youth Day event that drew 1.5 million.
Pope Benedict XVI is cheered by faithful as he arrives in Plaza de Cibeles to meet with youths, in Madrid, Thursday, Aug. 18, 2011. The Pontiff arrived in the Spanish capital of Madrid for a four-day visit on the occasion of the Catholic Church's World Youth Day. (AP Photo/Gregorio Borgia)
