U.S. President George W. Bush and his wife Laura, are escorted by a Canadian mountie and the new U.S. ambassador to Canada, Paul Cellucci (back left), after stepping down from Air Force One at the Quebec City airport upon arrival to attend the third Americas Summit, April 20, 2001. The heads of 34 Western Hemisphere nations will meet from April 20-22 to discuss the creation of a free trade zone. REUTERS/Jim Bourg