World Celebrates St. Patrick's Day

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.

Children wait to catch a view of the St Patrick's day parade in the center of Belfast, Northern Ireland, March 17, 2015.

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.

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.