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A fire truck moves through thousands of protesters in the streets as the deadline nears when the city wants them to vacate the Occupy Portland Camp in Portland, Ore., Sunday, Nov. 13, 2011. Mounted police and police in riot gear moved in but were forced to back down by the crowd. (AP Photo/Don Ryan)

A fire truck moves through thousands of protesters in the streets as the deadline nears when the city wants them to vacate the Occupy Portland Camp in Portland, Ore., Sunday, Nov. 13, 2011. Mounted police and police in riot gear moved in but were forced to back down by the crowd. (AP Photo/Don Ryan)

Police move in on occupy Portland

Several hundred protesters, some wearing goggles and gas masks, marched past authorities in a downtown street Sunday, hours after riot police drove Occupy Portland demonstrators out of a pair of weeks-old encampments in nearby parks.