Occupy Oakland demonstrators and police stand their ground during a standoff on May Day in front of City Hall in Frank Ogawa Plaza in Oakland

 
Occupy Oakland demonstrators and police stand their ground during a standoff on May Day in front of City Hall in Frank Ogawa Plaza in Oakland
Occupy Oakland demonstrators and police stand their ground during a standoff on May Day in front of City Hall in Frank Ogawa Plaza in Oakland, California, May 1, 2012. REUTERS/Beck Diefenbach