Photo by Cary Bass.

Photo by Cary Bass.

The Occubus. Photo by Steve Rhodes.

An Occupy Oakland demonstrator is arrested during a confrontation with police officers near the Oakland Museum of California in Oakland, California January 28, 2012. Police fired tear gas at hundreds of Occupy Oakland protesters who tried to take over a shuttered convention center on Saturday, arresting 19 people in the latest clash between anti-Wall Street activists and authorities in the California city. REUTERS/Stephen Lam

Photo by Steve Rhodes.

Occupy Oakland demonstrators shield themselves during a confrontation with the police near the Oakland Museum of California in Oakland, California January 28, 2012. Police fired tear gas at hundreds of Occupy Oakland protesters who tried to take over a shuttered convention center on Saturday, arresting 19 people in the latest clash between anti-Wall Street activists and authorities in the California city. REUTERS/Stephen Lam

Photo by Steve Rhodes.

Photo by Glenn Halog.

Photo by Glenn Halog.

Members of the Oakland Police Department shrouded in a cloud of tear gas put on gas masks during a confrontation with Occupy Oakland demonstrators near Oakland Museum of California in Oakland, California January 28, 2012. Police fired tear gas at hundreds of Occupy Oakland protesters who tried to take over a shuttered convention center on Saturday, arresting 19 people in the latest clash between anti-Wall Street activists and authorities in the California city. REUTERS/Stephen Lam

Photo by Steve Rhodes.

Members of the Oakland Police Department arrest an Occupy Oakland demonstrator during a confrontation in Downtown Oakland, California January 28, 2012. Police fired tear gas at hundreds of Occupy Oakland protesters who tried to take over a shuttered convention center on Saturday, arresting 19 people in the latest clash between anti-Wall Street activists and authorities in the California city. REUTERS/Stephen Lam

An Occupy Oakland demonstrator waits for medical assistance during a mass arrest outside a YMCA after a day-long demonstration in Oakland, California January 28, 2012. Riot police fought running skirmishes with anti-Wall street protesters in Oakland on Saturday, firing tear gas and bean bag projectiles and arresting more than 200 people in clashes that injured three officers and at least one demonstrator. Picture taken January 28. REUTERS/Stephen Lam

A masked Occupy Oakland demonstrator walks in a cloud of smoke from smoke grenades during an attempt to occupy the vacant Henry J. Kaiser Convention Center in Oakland, California January 28, 2012. Police fired tear gas at hundreds of Occupy Oakland protesters who tried to take over the shuttered convention center on Saturday, arresting 19 people in the latest clash between anti-Wall Street activists and authorities in the California city. REUTERS/Stephen Lam

A woman pleads with Occupy Oakland protestors to not burn an American flag found inside Oakland City Hall during an Occupy Oakland protest, Saturday, January 28, 2012, in Oakland, Calif. Police were in the process of arresting about 100 Occupy protesters for failing to disperse Saturday night, hours after officers used tear gas on a rowdy group of demonstrators who threw rocks and flares at them and tore down fences. (AP Photo/Beck Diefenbach)

Occupy Oakland protestors burn an American flag found inside Oakland City Hall during an Occupy Oakland protest on the steps of City Hall, Saturday, January 28, 2012, in Oakland, Calif. (AP Photo/Beck Diefenbach)

An Oakland City police officer stomps out a burning American flag after Occupy Oakland protestors set City Hall's flag on fire during an Occupy Oakland protest, Saturday, Jan. 28, 2012, in Oakland, Calif. (AP Photo/Beck Diefenbach)

Prisoners in the Alameda County Jail watch through their windows as Occupy Oakland protestors chant outside the jail during an anti-police protest, Saturday, January 28, 2012, in Oakland, Calif. Oakland police said they arrested about 300 people Saturday as protesters spent a portion of the day trying to get into a vacant convention center, and later broke into City Hall and tried to occupy a YMCA. (AP Photo/Beck Diefenbach)