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Tibetan Buddhists and tourists view a giant Thangka, a religious silk embroidery or painting, displayed on a hill near the Langmu Temple in Gannan Tibetan Autonomous Prefecture, Gansu province, China February 15, 2011. Local Tibetan monks and pilgrims gather to celebrate "Monlam", or Great Prayer Festival, one of the most important festivals in Tibetan Buddhism. REUTERS/Stringer

A devotee (R) offers water to a man portraying God Madhavnarayan in Thecho near Kathmandu during the Madhav Narayan Mela, Nepal February 15, 2011. The month-long festival dedicated to God Madhavnarayan and Goddess Swasthani, involves the recitation of folk tales about miraculous feats performed by them in many Hindu households. REUTERS/Navesh Chitrakar

A security guard kicks a man (C) who pulled out a gun on a public bus in Guatemala City February 15, 2011. Robberies on buses are a daily occurrence in Guatemala, according to the GAM (Grupo de Apoyo Mutuo), an organization that monitors human rights abuses. Twenty-four passengers were killed and 110 injured while using public buses last year, according to GAM. REUTERS/Daniel LeClair

A model poses for a portrait backstage before the Betsey Johnson Fall/Winter 2011 collection show during New York Fashion Week February 14, 2011. REUTERS/Eric Thayer

A man stretches during his morning exercise at the snow-covered Temple of Heaven park in Beijing February 15, 2011. REUTERS/Grace Liang

Gift bags are placed on seats before the Betsey Johnson Fall/Winter 2011 collection show during New York Fashion Week February 14, 2011. REUTERS/Eric Thayer

Family members of the protester, who was killed this morning during police clashes, mourn at a hospital after receiving news of his death in the Bahraini capital of Manama, February 15, 2011. Thousands of Shi'ite protesters marched into the capital on Tuesday after a man was killed in clashes between police and mourners at a funeral for a demonstrator shot dead at an earlier anti-government rally. REUTERS/Hamad I Mohammed

Interior Ministry officers stay warm in a subway near Manezh square as they stand guard to prevent possible Russian nationalists from holding an unauthorized rally and clashing with non-Slavic minorities in central Moscow, February 15, 2011. REUTERS/Denis Sinyakov

An anti-government protester shouts slogans as riot police stand guard in Sanaa, Yemen February 15, 2011. Hundreds of anti-government demonstrators and government loyalists fought with rocks and batons in the Yemeni capital on Tuesday in political unrest fueled by the Egyptian uprising. REUTERS/Khaled Abdullah

A worker makes last touches to artwork "Sala de Juntas" of Cuban artist Los Carpinteros at Madrid's International Contemporary Art fair ARCO in Madrid February 15, 2011. The fair will be open from February 15 to 20. REUTERS/Sergio Perez

Members of the Iranian parliament shout slogans calling for the execution of opposition leaders before the start of their session in Tehran February 15, 2011. Iranian lawmakers urged judiciary on Tuesday to hand out death penalties to opposition leaders for fomenting unrest in the Islamic state after a rally in which one person was killed and dozens were wounded, state media said. REUTERS/Raouf Mohseni/Mehr News/Handout

West Indies' Chris Gayle is bowled out as Sri Lankan captain Kumar Sangakkara looks on during a Cricket World Cup warm-up match in Colombo, Sri Lanka February 15, 2011. REUTERS/Andrew Caballero-Reynolds

Visitors watch a sound and light show at the Giza pyramids February 15, 2011. Tourism accounts for a bigger chunk of Egypt's economy, more than 11 percent of its GDP, making it one of the top sources of foreign revenue. REUTERS/Asmaa Waguih

AC Milan's Gennaro Gattuso (R) argues with Tottenham Hotspur's first team coach Joe Jordan (C) next to manager Harry Redknapp during the Champions League soccer match at the San Siro stadium in Milan February 15, 2011. REUTERS/Stefano Rellandini

A township resident holds an old drum used as part of a barricade during protests over the delivery of basic housing and education near Ermelo, 200 km (120 miles) east of Johannesburg, South Africa February 15, 2011. Local media reported that one resident was killed but the police would not confirm or deny the report. REUTERS/Mike Hutchings

Jackson, an American Cocker Spaniel, stands on a table in the grooming area before judging of his breed at the 135th Westminster Kennel Club Dog Show in New York, February 15, 2011. REUTERS/Mike Segar

A man looks on as an octopus-shaped kite is flown at a square in Jilin, Jilin province February 15, 2011. REUTERS/China Daily

Demonstrators flee as Somali government forces open fire during a protest in Mogadishu February 15, 2011. Three people were reported to have died and several other wounded in the incident. REUTERS/Feisal Omar

Maya Angelou receives a Medal of Freedom from U.S. President Barack Obama at the White House in Washington, February 15, 2011. REUTERS/Larry Downing

Thousands of protesters gather at Pearl Roundabout in the heart of the Bahraini capital Manama February 15, 2011. Thousands of Shi'ite protesters marched into the capital of Bahrain on Tuesday after a man was killed in clashes between police and mourners at a funeral for a demonstrator shot dead at an earlier anti-government rally. REUTERS/Hamad I Mohammed

Recruiters hold up job advertisements for migrant labour at a job market in Yiwu, Zhejiang province, February 15, 2011. China's booming coastal provinces are facing a labour shortage after the Lunar New Year holidays as the seemingly endless flow of migrant workers dries up. More and more workers in the traditional manufacturing belts in the Pearl River and Yangtze River deltas are staying back in their home villages in the countryside due to rapid urbanization and economic development in China's interior. REUTERS/Aly Song

Models present creations from the Bibhu Mahapotra Fall/Winter 2011 collection show during New York Fashion Week February 15, 2011. REUTERS/Eric Thayer

A young acrobat performs during the Shehuo festival to celebrate the upcoming lantern festival in Taiyuan, Shanxi province, China February 16, 2011. The lantern festival marks the last day of the Chinese Lunar New Year celebrations and falls on February 17 this year. REUTERS/Stringer

A street performer reacts after getting injured during riots in Oaxaca February 15, 2011. Hundreds of members of the teacher's union, teachers and students took to the streets to protest after they were denied access to Mexico's President Felipe Calderon who was in town. REUTERS/Jorge Luis Plata