A man holds a poster supporting janitors rights during May Day demonstrations in San Francisco

 
A man holds a poster supporting janitors rights during May Day demonstrations in San Francisco
A man holds a poster supporting janitors rights during May Day demonstrations in San Francisco, 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/Robert Galbraith (UNITED STATES - Tags: CIVIL UNREST BUSINESS EMPLOYMENT POLITICS)