Police closed 27 roads during the G20 Summit in Pittsburgh between September 24th and September 26th. In the days before the summit began, demonstrations had already begun.http://online.wsj.com/article/SB125348613742626219.html

Over the two-day summit, thousand took to the streets in protest. By September 25, 2009, police had arrested a total of 66 protesters. The ACLU criticized police for using pepper spray, throwing cans of smoke and using batons on some of the protesters. The legal director of ACLU Pennsylvania said, "In a week when we need freedom of speech more than ever, free speech died in Pittsburgh this week."http://www.google.com/hostednews/ap/article/ALeqM5jz5PoD9qb-An3UTF1pQjWpJgALBwD9AUJCRO1http://www.nytimes.com/2009/09/26/world/26pittsburgh.html

Thousands participated in protests at the British capital and surrounding areas ahead of the G20 summit which begins on April 2, 2009.

On April 1, 2009, protesters clashed with police in London and a group smashed windows at the Royal Bank of Scotland's building in the financial district. Some demonstrators vandalized the side of the building by spray painting the word "Thieves." Others entered the building and threw large office equipment onto the street. Several protesters were arrested. The protests continued as the summit began on April 2, 2009.WashingtonPost.com: G-20 Protesters Jam Downtown London, Target Banks (April 1, 2009)

Information about Transportation Restrictions in Pittsburgh during the G20 Summit

Dept of Transportation: Pittsburgh G-20 Transportation Safety Plan

Road Closures during G20 Summit in Pittsburgh

Secret Service Security Perimeter