Police move through a makeshift kitchen, known as the Thunderdome, at Occupy Denver, smashing as they walk. The clearing out of Civic Center Park began on November 12, 2011, six Saturdays after Occupy Denver began with hundreds of participants marching through the city's downtown. #

An Occupy Denver protester is searched after being tackled and arrested by Denver police, who began arresting people on the 16th Street Mall, on November 12, 2011, in Denver, to end their second march of the day. #

Riot police are engulfed in a mass of defiant protesters at the Occupy Portland camp, on November 13, 2011, in Portland, Oregon. In spite of an eviction notice for early Sunday morning, Portland police delayed closing two downtown parks early today as thousands of people converged to support the Occupy Portland movement. #

A protester pleads with police during a demonstration near the Occupy Portland encampment, on November 13, 2011, in Portland, Oregon. Portland police have reclaimed the two parks in which occupiers have been camping after a night of brinksmanship with protesting crowds of several thousands. #

Police officers arrests a protester in the Portland encampment, on November 13, 2011, in, Portland, Oregon. In a tense escalation of the Occupy Portland protest, police in riot gear Sunday surrounded demonstrators in a downtown park area after hundreds of people defied the mayor's order to leave the park by midnight. By early afternoon, officers had mostly surrounded the camp where the protesters were holding a "general assembly" meeting to discuss their next moves following the eviction order. #

Debris is scattered on the grounds of a park where Occupy Portland demonstrators camped, on November 14, 2011, in, Portland, Oregon. Two downtown Portland parks where Occupy Portland demonstrators camped for weeks are clear Monday and police say crews will be removing debris and assessing damage. Mayor Sam Adams ordered the camps cleared over the weekend because of unhealthy conditions, drug use and other crime. #

Police in riot gear are silhouetted against cyclone and barbed wire fencing surrounding Chapmen Square where the Occupy Portland camp used to be in Portland, Oregon, on November 13, 2011. Protesters were allowed back into the camp early Sunday morning but police in riot gear came in later in the day, moved the protesters out and started cleaning up and fencing the park blocks. #

Protesters at the Occupy Portland camp chant slogans and hold up signs on November 13, 2011, in Portland, Oregon. In spite of an eviction notice for early Sunday morning, Portland police delayed closing two downtown parks early today as thousands of people converged to support the Occupy Portland movement. #

Members of the Occupy Paradeplatz movement look on as Zurich riot police officers stand guard during their removal from the Lindenhof in Zurich, on November 15, 2011. Police began to clear the Lindenhof in downtown Zurich on early Tuesday morning, where protesters from the movement have been camping since October. #

An Occupy Oakland protester is handcuffed to be detained as police officers take down the Occupy Oakland encampment at the Frank Ogawa Plaza in front of the Oakland City Hall, on November 14, 2011, in Oakland, California. Hundreds of police in riot gear swept into the Occupy Oakland site at dawn on Monday, an officer said, ordering protesters to leave the camp, which has been a weeks-long source of tension for the California city. #

Police officers take down tents of the Occupy Oakland encampment to evict Occupy Oakland protesters, who are camping at the Frank Ogawa Plaza in front of the Oakland City Hall, on November 14, 2011, in Oakland, California. #

Police break up an encampment for an Occupy Wall Street demonstration in Oakland, California, on November 14, 2011. Police in Oakland began clearing out a weeks-old encampment early Monday after issuing several warnings to Occupy demonstrators. #

Demonstrators re-enter the Frank H. Ogawa plaza after authorities moved in and evicted Occupy Oakland's encampment in Oakland, California, on November 14, 2011. Police moved in early on Monday and cleared out anti-Wall Street protesters from Oakland's City Hall plaza, arresting 33 people but avoiding the sort of clashes that marked a previous attempt to shut down the Occupy Oakland camp. #

Pat Kanzler, of Eureka, California, stands outside the Humboldt County Courthouse in Eureka, California, Monday morning, November 14, 2011. Earlier Monday, authorities arrested 32 people and cleared out an Occupy encampment. Eureka police Sgt. Stephen Watson told the San Francisco Chronicle that the people arrested will be held until they post bail, and that the Humboldt County district attorney will file unlawful lodging and other charges. #

Police officers disperse Occupy Wall Street protesters near the encampment at Zuccotti Park in New York, early Tuesday, November 15, 2011. At about 1 a.m. Tuesday, police handed out notices from the park's owner, Brookfield Office Properties, and the city saying that the park had to be cleared because it had become unsanitary and hazardous. Protesters were told they could return, but without sleeping bags, tarps or tents. #

People link arms a few blocks from Zuccotti Park as New York City officials clear the Occupy Wall Street protest from the park in the early morning hours of November 15, 2011, in New York. #

A man confronts a New York Police Department officer a few blocks from Zuccotti Park as New York City officials clear the Occupy Wall Street protest from the park in the early morning hours of November 15, 2011, in New York. #

An Occupy Wall Street protester is arrested by New York City police officers after the protesters were evicted from Zuccotti Park, on November 15, 2011, in New York City. #

An arrested Occupy Wall Street protester screams from a police van, on November 15, 2011, in New York. Police evicted the protesters from Zuccotti Park. Hundreds of police in riot gear dismantled the Occupy Oakland camp Monday, evicting and arresting protesters in the second such US move in as many days as authorities get tough against the two-month-old protest movement. #

A protester affiliated with the Occupy Wall Street movement pours milk over the eyes of another fellow protester to ease the pain from pepper spray during an unannounced raid by the New York City Police Department outside Zuccotti Park in New York, in the early hours of November 15, 2011. #

A woman yells at New York Police Department officers as New York City officials clear the Occupy Wall Street protest from Zuccotti Park in the early morning hours of November 15, 2011, in New York City. #

An Occupy Wall Street protester yells out at police after being ordered to leave Zuccotti Park, the Movement's longtime encampment in New York, early Tuesday, November 15, 2011. #

Lieutenant Hayward of the New York Police Department prepares to strike Brent Schmidt (right) after members of the Occupy Wall Street movement were removed from Zuccotti Park in New York November 15, 2011. #

A member of the Department of Sanitation removes a drum, among other belongings of the Occupy Wall Street movement, from Zuccotti Park in New York, on November 15, 2011. Authorities declared that the continued occupation of Zuccotti Park -- which had become a sea of tents, tarps and protest signs with hundreds of demonstrators sleeping there -- posed a health and safety threat. #

Workers use pressure washers to clean Zuccotti Park after New York City police in riot gear removed Occupy Wall Street protesters early on November 15, 2011, in New York City. #

A man sits on the back of a New York Police Department squad car as he is surrounded by demonstrators affiliated with the Occupy Wall Street movement in New York, on November 15, 2011. Police wearing helmets and carrying shields evicted protesters with the Occupy Wall Street movement early on Tuesday from the park in New York City's financial district where they have camped since September, dismantling their tent city and arresting about 70 people. #

A pedestrian takes a picture of an empty and closed Zuccotti Park in New York, early on November 15, 2011. Police officers evicted Occupy Wall Street protesters from the park overnight. The National Lawyers Guild obtained a court order allowing the protesters to return with their tents to the park, where they have camped for two months. The guild said the injunction prevents the city from enforcing park rules on the protesters. #

A statue of a businessman sits behind a police barricade at the edge of a closed Zuccotti Park in New York, on November 15, 2011, after the Occupy Wall Street encampment was cleared form the park in the early morning hours after a nearly two month occupation. #