This painting, attributed to elusive British graffiti artist Banksy, appeared in Camden Town, London in December 2009, during the Copenhagen climate conference. Zuma/Newscom
Graffiti by Norwegian artist Dolk is pictured on the wall of a building in Lisbon, Portugal, on Aug. 15, 2008. Several well-known graffiti artists painted the walls of this bohemian neighborhood, creating an 'Ephemeral Museum.' Francisco Leong/AFP/Newscom/File
A Palestinian man walks near a graffiti of late Palestinian leader Yasser Arafat at the Palestinian Authority headquarters in the West Bank city of Ramallah a day before the fifth anniversary of Arafat's death on Nov. 10, 2009. Mohammed Abed/AFP/Newscom
Posters of then-Candidate Barack Obama as Superman are seen on the street in New York City in Oct. 2008. Newscom/File
'Quasikunst' (Quasi-Art) Graffiti is seen in the Hackeschen Höfe, Berlin, Germany, on Nov. 6, 2009. Newscom
Erica Goulden (r.) takes a picture of her friend Macey Truett next to a design by graffiti artist Banksy along Main Street during the Sundance Film Festival in Park City, Utah, on Jan. 22. Chris Pizzell/AP
A Kosovo Albanian youth walks beside graffiti near the bridge that ethnically divides the Albanian south and Serbian north of Kosovska Mitrovica on Sept. 27, 2007. Visar Kryeziu/AP/File
A graffiti artist paints a wall in the likeness of Johnny Depp from the movie 'Alice in Wonderland,' in Kuala Lumpur, Malaysia on Jan. 7. Zuma/Newscom
Another mural attributed to Banksy is seen in London in December. PTS/Newscom
A graffiti artist sprays the word 'Resistance' in Arabic outside the venue where the Arab and International Forum to support the Resistance is taking place in Beirut on Jan. 15. Jamal Saidi/Reuters
A man stands next to a graffiti depicting US President Barack Obama dressed like Santa Claus and holding a missile, in Caracas, Venezuela on Dec. 14, 2009. Jorge Silva/Reuters
A view of a painting on the so-called East Side Gallery is seen in Berlin, Germany, on April 16, 2006. Kathrin Brunnhofer/Newscom
An anti-smoking mural is seen on S 4th and Berry Streets in Williamsburg, Brooklyn in August 2008. Elizabeth A. Miller/Sipa Press/Newscom
San Diego graffiti artist 'Persue' competes in the second annual Living Word graffiti battle in West Oakland's DeFremery Park. The handpicked competitors include some of the most well-known graffiti artisits in the country. Each contestant gets five hours to paint one word on a 16 x 18-foot canvas with their work being judged on concept, form, and color palette. This year's theme word, chosen from a hat, was 'Life.' Zuma/Newscom
Turkey's Prime Minister Recep Tayyip Erdogan addressed hundreds of thousands of his cheering supporters in Istanbul saying, 'My patience has run out' with anti-government protests.
Turkey’s largest city was divided on Sunday by competing shows of force, between Prime Minister Recep Tayyip Erdogan, who staged a mammoth rally of loyalists, and anti-government demonstrators, who clashed with police on Istanbul's streets once again to protest his rule.
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