Police officers stand guard outside Union Square Park, which is closed in preparation for May Day demonstrations, in New York City

 
Police officers stand guard outside Union Square Park, which is closed in preparation for May Day demonstrations, in New York City
Police officers stand guard outside Union Square Park, which is closed in preparation for May Day demonstrations, in New York City May 1, 2012. Occupy Wall Street vows a day of demonstrations in New York and across the United States on Tuesday, in a crucial test of its staying power some eight months after emerging as a movement against corporate greed and economic inequality. REUTERS/Lee Celano (UNITED STATES - Tags: CIVIL UNREST BUSINESS POLITICS)