Occupy demonstrators board up the entrance to an unidentified building during May Day protests in Oakland

 
Occupy demonstrators board up the entrance to an unidentified building during May Day protests in Oakland
Occupy demonstrators board up the entrance to an unidentified building during May Day protests in Oakland, California May 1, 2012. Occupy Wall Street protesters massed outside banks, meditated in public and staged anti-corporate song and dance routines on Tuesday in a May Day effort to revive a movement that triggered nationwide protests against economic injustice last year. REUTERS/Stephen Lam (UNITED STATES - Tags: CIVIL UNREST BUSINESS EMPLOYMENT POLITICS)