Jendoco Construction workers Andrew Beck (bottom) and Tony Dalessandro board up the windows to a building on William Penn Place on Wednesday, Sept. 23, 2009, the day before the G-20 summit.

David Meiern of Squirrel Hill addresses Pittsburgh City Council while wearing a polar bear mask during a public hearing on protesting during the G-20 at the City-County Building on Wednesday, Aug. 2, 2009. Meiern was addressing a proposed city ordinance on the concealment of identity during the G-20.

A woman chants during an unlawful protest march that began at Arsenal Park in Lawrenceville and tried unsuccessfully to make its way to the Convention Center, Downtown, on Thursday, Sept. 24, 2009.

Riot police stand along the route of ''The People's March,'' where thousands of people walked from Oakland to the City-County Building in Downtown Pittsburgh, and from there to East Park on the North Side, on Friday.

A protestor flips off a group of riot police while plugging his ears to dampen the sound made by a Long Range Acoustic Device, or LRAD, during an unlawful protest march that began at Arsenal Park in Lawrenceville and tried unsuccessfully to make its way to the Convention Center downtown on Thursday, Sept. 24, 2009.

A police officer stands in front of a row of people watching "The People's March," where thousands of people walked from Oakland to the City-County Building in Downtown Pittsburgh, and from there to East Park on the North Side, on Friday, Sept. 25, 2009.

After suffering from the effects of tear gas deployed by the police, a man has a solution poured into his eyes during an unlawful protest march that began at Arsenal Park in Lawrenceville and tried unsuccessfully to make its way to the Convention Center, Downtown on Thursday, Sept. 24, 2009.

A police officer on Fifth Avenue keeps an eye on the crowd during "The People's March," where thousands of people walked from Oakland to the City-County Building in Downtown Pittsburgh, and from there to East Park on the North Side, on Friday, Sept. 25, 2009.

Police arrest a man that approached them during an unlawful protest march that began at Arsenal Park in Lawrenceville and tried unsuccessfully to make its way to the Convention Center, Downtown, on Thursday, Sept. 24, 2009.

A group of anarchists change into street clothes so that they can leave the group during an unlawful protest march that began at Arsenal Park in Lawrenceville and tried unsuccessfully to make its way to the Convention Center, Downtown, on Thursday, Sept. 24, 2009.

Several anarchists march in "The People's March," where thousands of people walked from Oakland to the City-County Building in Downtown Pittsburgh, and from there to East Park on the North Side, on Friday, Sept. 25, 2009.

A man lies down in a parking lot after marching in "The People's March" on Friday, Sept. 25, 2009.