LONDON - MARCH 30:  President of Mexico Felipe Calderon (L) attends a state banquet hosted by Queen Elizabeth II (R) at Buckingham Palace on March 30, 2009 in London, England. President of the United Mexican States Felipe Calderon and  his wife Margarita Zavala de Calderon are on a four-day state visit to the United Kingdom from March 30 - April 2.  (Photo by Stephen Hird/WPA Pool/Getty Images)