CHESTER, ENGLAND - MAY 17: Queen Elizabeth II visits Chester Zoo as part of her tour of the North West on May 17, 2012 in Chester, England. The Queen is visiting many parts of Britain as she celebrates her Diamond Jubilee culminating with a four-day public holiday on June 2-5, including a pageant of 1,000 boats on the River Thames. (Photo by Paul Grover - WPA Pool/Getty Images)
