DUBLIN, IRELAND - MAY 18: Queen Elizabeth II (C) and Prince Philip, Duke of Edinburgh (L) watch a pint of Guinness being poured as they visit the Guinness Storehouse on May 18, 2011 in Dublin, ... more 
DUBLIN, IRELAND - MAY 18: Queen Elizabeth II (C) and Prince Philip, Duke of Edinburgh (L) watch a pint of Guinness being poured as they visit the Guinness Storehouse on May 18, 2011 in Dublin, Ireland. The Duke and Queen's visit to Ireland is the first by a British monarch since 1911. An unprecedented security operation is taking place with much of the centre of Dublin turning into a car-free zone. Republican dissident groups have made it clear they are intent on disrupting proceedings. (Photo by Tim Rooke-Pool/Getty Images) less 
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Wed, May 18, 2011 8:00 AM EDT