A painting of a Trabant car bursting through a wall in post unification Berlin, August 1993. (Photo by Steve Eason/Hulton Archive/Getty Images)

A Republican mural is seen on the side of a house in the Bogside are of Londonderry, the scene of the 'Bloody Sunday' shootings, on February 10, 2005 in Londonderry, Northern Ireland. Northern Ireland has become deadlocked in the peace process after the IRA recently said they were withdrawing a conditional offer to give up their weapons. (Photo by Christopher Furlong/Getty Images)

A giant new exhibition space created by famed graffiti artist Banksy opens to the public on May 3, 2008 in London, England. The disused tunnel beneath Waterloo station has been transformed by 30 artists from around the world. The three day event, tagged as the 'Cans festival', also invites the public to add their own stencil art. (Photo by Jim Dyson/Getty Images)

A Palestinian woman pauses to look at a wall painting by elusive British graffiti artist Banksy December 5, 2007 on a shop wall in the biblical city of Bethlehem in the West Bank. The Bristol-born artist has adorned Israel's West Bank separation barrier and Bethlehem walls with new images, including this one of a dove wearing a flak jacket and a soldier being frisked by a young girl. His works, along with those of other international artists, are part of an exhibition called Santa's Ghetto. (Photo by David Silverman/Getty Images)

A massive new street art commission is applied to the river facade of the Tate Modern gallery on May 21, 2008 in London. This is the first major public museum display of street art in London, presenting the work of six internationally acclaimed artists. (Photo by Jim Dyson/Getty Images)

A Palestinian passes a wall painting by elusive British graffiti artist Banksy December 5, 2007 on a wall in the biblical city of Bethlehem in the West Bank. The Bristol-born artist has adorned Israel's West Bank separation barrier and Bethlehem walls with new images, including this one of a soldier being frisked by a young girl and a dove wearing a flak jacket. His works, along with those of other international artists, are part of an exhibition called Santa's Ghetto. (Photo by David Silverman/Getty Images)

A Palestinian Woman Walks Past Graffiti Of The Islamic Militant Group Hamas On A Wall May 13, 2002 At The Rafah Refugee Camp, In The Southern Gaza Strip. Israeli Forces Retreated From A Planned Gaza Strip Offensive After Israel Received Diplomatic Pressure And Dissent From Generals That Undermined The Plan. (Photo By Abid Katib/Getty Images)

A graffiti titled “Escapism” made by the British, guerrilla, graffiti artist Banksy is seen on Israel's highly controversial West Bank barrier in Ramallah on August 6, 2005. Banksy has made a name for himself with provocative images stencilled around the streets of London. On his recent trip to the Palestinian territories he has created nine of his images on Israel's highly controversial West Bank barrier. (Photo by Marco Di Lauro/Getty Images)

An outdoor market is shown beneath a colorfully painted wall on Huangjueping Street May 10, 2007 in Chongqing Municipality, China. Sichuan Fine Arts Institute is investing 10 million yuan (about US$1.28 million) to build Chongqing's first Performance Art Street by June 9 on Huangjueping Street where the institute is located. The .78-mile-long street will be decorated with sculptures while the buildings will be covered in colorful graffiti. (Photo by China Photos/Getty Images)

A Republican mural is seen on the side of a house in the Bogside are of Londonderry, the scene of the “Bloody Sunday” shootings, on February 10, 2005 in Londonderry, Northern Ireland. Northern Ireland has become deadlocked in the peace process after the IRA recently said they were withdrawing a conditional offer to give up their weapons. (Photo by Christopher Furlong/Getty Images)

People take a photo in front of graffito of the Beijing 2008 Olympic mascots on the wall November 12, 2005 in Beijing, China. Beijing Olympic organizers chose five mascots for the 2008 Olympics representing a panda, a Tibetan antelope, a swallow, a fish and the spirit of the Olympic flame. (Photo by Guang Niu/Getty Images)

A new stencil painting on a concrete barricade by elusive British graffiti artist Banksy shows a rat holding a slingshot December 5, 2007 opposite an Israeli army guard post (unseen) where Israel's separation barrier cuts into the biblical city of Bethlehem in the West Bank. The Bristol-born artist has adorned Israel's West Bank separation barrier and Bethlehem walls with new images, including one of a dove wearing a flak jacket and a soldier being frisked by a young girl. His works, along with those of other international artists, are part of an exhibition called Santa's Ghetto. (Photo by David Silverman/Getty Images)

Australian peacekeeping soldiers patrol through the smoke from an entire block of burning homes with Graffiti on a walls depicting death, June 5, 2006 in Dili, East Timor. Australia wants the United Nations to provide a police force for the small nation in political turmoil as the international peacekeeping force, mostly from Australia tries to calm down the city. The capitol was mostly calm on Saturday, after dozens of homes and business were torched in the past two weeks. (Photo by Paula Bronstein /Getty Images)

A woman sits in front of a wall with colorful graffiti during an activity to celebrate the upcoming 100-day-countdown to the 2008 Beijing Olympics, which will fall April 30, at the Beijing Institute of Technology April 26, 2008 in Beijing, China. China has geared up its preparations for the 2008 Beijing Olympic Games. (Photo by China Photos/Getty Images)

Palestinians pass a wall painting by elusive British graffiti artist Banksy December 5, 2007 on a shop wall in the biblical city of Bethlehem in the West Bank. The Bristol-born artist has adorned Israel's West Bank separation barrier and Bethlehem walls with new images, including this one of a soldier checking a donkey's identity documents, a soldier being frisked by a young girl and a dove wearing a flak jacket. His works, along with those of other international artists, are part of an exhibition called Santa's Ghetto. (Photo by David Silverman/Getty Images)

A recent Banksy work is pictured on a wall on March 5, 2008 in London, England. The grafitti shows a child raising a Tesco's plastic bag as a flag. Gordon Brown has said he will force retailers to help reduce the use of plastic bags if they do not take action voluntarily. (Photo by Cate Gillon/Getty Images)