Pope Benedict XVI (37 images)

Pope Benedict XV delivers his speech to the General Assembly during his visit to the United Nations on April 18, 2008 in New York. Benedict, who is on his first visit to the U.S. as pontiff, will later visit St. Patrick's Cathedral, Ground Zero and then hold an open-air mass at Yankee Stadium on at the conclusion of his visit on Sunday. (UPI Photo/Monika Graff)

Pope Benedict XVI speaks to Catholic educators at Catholic University of America in Washington on April 17, 2008. The Catholic University of America is the only papally chartered university in the United States. (UPI Photo/Alexis C. Glenn)

Pope Benedict XVI meets with American Catholic bishops at the Crypt Church of the Basilica of the National Shrine in Washington on April 16, 2008. This is the Pope's first visit to the United States. (UPI Photo/Alexis C. Glenn)

Pope Benedict XVI proceeds to the podium to address the General Assembly at the United Nations on April 18, 2008 in New York. Benedict, who is on his first visit to the U.S. as pontiff, will later visit St. Patrick's Cathedral, Ground Zero and then hold a mass at Yankee Stadium on at the conclusion of his visit on Sunday. (UPI Photo/Ezio Petersen)