Pope Benedict XVI (37 images)

Pope Benedict XVI acknowledges the audience before he 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)

Members of the Marine Corp. Band are seen reflected in an instrument as they play for Pope Benedict XVI during an official welcoming ceremony hosted by the President George W. Bush and First Lady Laura Bush on the South Lawn of the White House in Washington on April 16, 2008. (UPI Photo/Aude Guerrucci/Pool)

The Marine Corp. Band performs for Pope Benedict XVI during an official welcoming ceremony hosted by the President George W. Bush and First Lady Laura Bush on the South Lawn of the White House in Washington on April 16, 2008. (UPI Photo/Aude Guerrucci/Pool)

U.S. President George W. Bush and Pope Benedict XVI greet members of the media as they walk through the colonnade of the Rose Garden on their way to a meeting in the Oval Office of the White House in Washington on April 16, 2008. This is the Pope's first visit to the United States and only the second visit in history by a Pope to the White House. (UPI Photo/Roger L. Wollenberg)