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PRESTWICK, UNITED KINGDOM - JULY 06: A secret service agent stands before the arrival of U.S. President George W. Bush at Prestwick Airport July 6, 2005 in Prestwick, Scotland. Leaders of the worlds richest countrys arrive in Scotland July 6 for the three-day G8 Summit at the Gleneagles Hotel. (Photo by Bruno Vincent/Getty Images)

PRESTWICK, UNITED KINGDOM - JULY 06:  A secret service agent stands before the arrival of U.S. President George W. Bush at Prestwick Airport July 6, 2005 in Prestwick, Scotland. Leaders of the worlds richest countrys arrive in Scotland July 6 for the three-day G8 Summit at the Gleneagles Hotel.  (Photo by Bruno Vincent/Getty Images)