2 / 29

Police confront demonstrators during May Day protests on Tuesday, May 1, 2012 in Oakland, Calif. Hundreds of activists across the U.S. joined the worldwide May Day protests on Tuesday, with Occupy Wall Street members in several cities leading demonstrations and in some cases clashing with police. (AP Photo/Marcio Jose Sanchez)

Police confront demonstrators during May Day protests on Tuesday, May 1, 2012 in Oakland, Calif. Hundreds of activists across the U.S. joined the worldwide May Day protests on Tuesday, with Occupy Wall Street members in several cities leading demonstrations and in some cases clashing with police. (AP Photo/Marcio Jose Sanchez)

May Day occupy arrests

Occupy Wall Street protesters smashed windows in Seattle, were chased through New York streets by police on scooters, and clashed repeatedly with officers in Oakland on Tuesday in May Day demonstrations intended to revive their movement.