Pope Benedict XVI hosted by the 316th Wing and the Air Force District of Washington, walks with President George W. Bush upon his arrival at Andrews Air Force Base, Md., Apr 15, 2008, beginning his weeklong trip to the United States. The Pontiff, selected 265th pope on April 15, 2008, will meet with President George W. Bush at the White House, address the presidents of Roman Catholic Colleges and Universities, and hold mass at Nationals Park in Washington D.C. and Yankee Stadium in New York City. (U.S. Air Force photo by Senior Airman Renae L. Kleckner)(released)