
Protesters are detained by Irish Police following clashes in the streets adjacent to the Garden on Remembrance where Queen Elizabeth II laid a wreath on May 17, 2011 in Dublin, Ireland. The Duke and Queen's visit is the first by a 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. By Oli Scarff/Getty Images.