A police officer attempts to control the scene after being surrounded while making an arrest at an "Occupy Wall Street" demonstration in response to an early morning police raid which displaced Occupy Oakland's tent city in Oakland, California October 25, 2011.
- [Stephen Lam/Reuters]

A masked Occupy Wall St. demonstrator walks away as authorities deploy tear gas during an demonstration in response to an early morning police raid which displaced Occupy Oakland's tent city in Oakland, California October 25, 2011.
- [Stephen Lam/Reuters]

An "Occupy Wall Street" demonstrator gestures after a scuffle between police officers and protestors during a protest in response to an early morning police raid which displaced Occupy Oakland's tent city in Oakland, California October 25, 2011.
- [Stephen Lam/Reuters]

An Occupy Wall St. demonstrator gestures as authorities deploy tear gas during a demonstration in response to an early morning police raid which displaced Occupy Oakland's tent city in Oakland, California October 25, 2011. Police and protesters scuffled in the streets of Oakland on Tuesday as more than 1,000 people marched on city hall to voice anger over scores of arrests at an "Occupy Wall Street" camp.
- [Stephen Lam/Reuters]

Police officers with less-lethal munitions (L) reconnect with a group of their stranded colleagues (R) during an "Occupy Wall Street" demonstration, in response to an early morning police raid which displaced Occupy Oakland's tent city, in Oakland, California October 25, 2011.
- [Stephen Lam/Reuters]

The remains of a chemical canister are seen after authorities reconnected with a group of stranded police officers during a demonstration by "Occupy Wall Street" protesters in response to an early morning police raid which displaced Occupy Oakland's tent city in Oakland, California October 25, 2011.
- [Stephen Lam/Reuters]

A sign is posted on the side of a tent at an Occupy Wall Street tent city in front of Oakland city hall on October 13, 2011 in Oakland, California.
- [Justin Sullivan/AFP/Getty Images]

An "Occupy Wall Street" demonstrator chants during a demonstration in response to an early morning police raid which displaced Occupy Oakland's tent city in Oakland, California October 25, 2011.
- [/AFP/Getty Images]

An Occupy Wall Street protester drops piles of hay on wet grass at tent city in front of Oakland city hall on October 13, 2011 in Oakland, California.
- [Justin Sullivan/AFP/Getty Images]

Porsche Miller cooks pancakes for Occupy Wall Street protestors at a tent city in front of Oakland city hall on October 13, 2011 in Oakland, California.
- [Justin Sullivan/AFP/Getty Images]

An Occupy protestor wears a 99 percent label in his hat after the Occupy Oakland camp was shut down by authorities on October 25, 2011 in Oakland, California.
- [Justin Sullivan/AFP/Getty Images]

Oakland police officers stand in the remains of the Occupy Oakland camp after police shut the encampment down on October 25, 2011 in Oakland, California.
- [Justin Sullivan/AFP/Getty Images]

Oakland police officers walks through the remains of the Occupy Oakland camp after police shut the encampment down on October 25, 2011 in Oakland, California.
- [Justin Sullivan/AFP/Getty Images]

Tents and other debris sit in the destroyed Occupy Oakland camp October 25, 2011 in Oakland, California.
- [Justin Sullivan/AFP/Getty Images]

Occupy Wall Street protester Kai C. reads the book "The Fall of America" by Allen Ginsberg as he sits at a tent city in front of Oakland city hall on October 13, 2011 in Oakland, California.
- [Justin Sullivan/AFP/Getty Images]

A sign is posted in front of an Occupy Wall Street tent city in front of Oakland city hall on October 13, 2011 in Oakland, California.
- [Justin Sullivan/AFP/Getty Images]

A bust of Frank Ogawa sits next to the remains of the Occupy Oakland camp after police shut the encampment down on October 25, 2011 in Oakland, California.
- [Justin Sullivan/AFP/Getty Images]