St. Patrick's Day across the world

3 of 25: Deirdre Kelly, left, Linda Forth, second from left, Darren McCarthy, center, and Eimear Ni Bhriain, of Dublin, Ireland, cheer on the marchers during the 251st annual St. Patrick's Day Parade, Saturday, March 17, 2012 in New York. (AP Photo/Mary Altaffer)

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