Celebrations mark St. Patrick's Day, March 17, 2015.
World Celebrates St. Patrick's Day
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The water in the fountain on the South Lawn of the White House flows green in celebration of St. Patrick's Day in Washington, March 17 2015.
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Children wait to catch a view of the St Patrick's day parade in the center of Belfast, Northern Ireland, March 17, 2015.
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Britain's Kate, the Duchess of Cambridge meets cadets during a visit to the 1st Battalion Irish Guards at the St. Patrick's Day Parade at Mons Barracks, Aldershot, in England, March 17, 2015.
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Alex Nowakowska left, and Joanna Puchlik right, both of Chicago, take a selfie after the Chicago River is dyed green ahead of the St. Patrick's Day parade in Chicago, March 14, 2015.