Protesters run through a flooded street from tear gas fired by police after a May Day march ended in clashes in downtown Bogota, Colombia, Tuesday, May 1, 2012. (AP Photo/Fernando Vergara)

Associated Press
Protesters run through a flooded street from tear gas fired by police after a May Day march ended in clashes in downtown Bogota, Colombia, Tuesday, May 1, 2012. (AP Photo/Fernando Vergara)
Protesters run through a flooded street from tear gas fired by police after a May Day march ended in clashes in downtown Bogota, Colombia, Tuesday, May 1, 2012. (AP Photo/Fernando Vergara)
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