Pope Benedict XVI

Pope Benedict XVI waves to the crowd while celebrating Mass at Nationals Park in Washington on Thursday, April 17, 2008. (Reuters/Jim Bourg) Read More

Buddhist Masako Fukata presents Pope Benedict XVI with a bell at the Pope John Paul II Cultural Center in Washington, Thursday, April 17, 2008. (AP Photo/Lawrence Jackson) Read More

Pope Benedict XVI at the Edward J. Pryzbyla University Center on the campus of The Catholic University of America Thursday, April 17, 2008 in Washington. (AP Photo/Haraz N. Ghanbari) Read More

Pope Benedict XVI gestures to the crowd while celebrating Mass at Nationals Park baseball stadium in Washington April 17, 2008. (Reuters/Larry Downing) Read More

Pope Benedict XVI attends a meeting of inter-religious faiths at the John Paul II Cultural Center on April 17, 2008 in Washington. (AFP Photo/Vincenzo Pinto) Read More