A man dressed as a demon performs with a bone during a religious procession at the Mahashivratri festival in the northern Indian city of Allahabad February 27, 2014. (Photo by Jitendra Prakash/Reuters)

Dancers parade during the Nice Carnival on February 25, 2014 in Nice, southeastern France. The theme of this year's carnival, running from February 14 until March 4, 2014, is the “King of Gastronomy”. (Photo by Valery Hache/AFP Photo)

A demonstrator breaks the window of a truck of Turkey's ruling Justice and Development Party (AKP) featuring a picture of Turkish Prime Minister Recep Tayyip Erdogan during clashes with riot police at a demonstration against the opening of a controversial new road development that will include a part of the Middle East Technical University campus in Ankara on February 25, 2014. (Photo by Adem Altan/AFP Photo)

NurNisa Yasmin Mohd Fadzil, 3, the youngest of three siblings, helps her mother, Suhaila Zakaria, 35, fill water into a bottle in Balakong, Selangor, Malaysia on February 26, 2014. (Photo by Norafifi Ehsan/The Star)

Protesters brace themselves as policemen use a water cannon during a protest in front of the US embassy in Manila on February 25, 2014. Protesters called for an end to what they described as US meddling in Philippine sovereignty, and against the expected visit of US President Barack Obama in April. (Photo by Noel Celis/AFP Photo)

A family gathers at a camp for displaced people at M'poko International Airport in Bangui February 26, 2014. (Photo by Camille Lepage/Reuters)

Pranab Boro, an activist of Krisak Mukti Sangram Samiti (KMSS) self-immolates in a protest demanding land rights for local people in various regions of eastern Assam state, in front of the Assam Secretariat in Guwahati on February 24, 2014. Boro died after hospitalisation with burns covering over 90 percent of his body. (Photo by Chinmoy Roy/AFP Photo)

Brazilian activist of Bastardxs movement, Sara Winter, demonstrates nude against male chauvinism in downtown Rio de Janeiro, Brazil on February 26, 2014. (Photo by Christophe Simon/AFP Photo)

A Tibetan monk adjusts his mask as he arrives for a religious ceremony, known as “Da Gui” or beating ghost, to celebrate the upcoming Tibetan New Year which starts on March 1 at Yonghegong Lama Temple, in Beijing, on February 28, 2014. (Photo by Jason Lee/Reuters)

Dancers parade on February 25, 2014 during the Nice Carnival, southeastern France. The theme of this year's carnival, running from February 14 until March 4, 2014, is the “King of Gastronomy”. (Photo by Valery Hache/AFP Photo)

An opposition demonstrator shoots a rudimentary mortar during a protest against President Nicolas Maduro's government in Rubio outside San Cristobal, about 410 miles (660 km) southwest of Caracas, February 27, 2014. (Photo by Carlos Garcia Rawlins/Reuters)

A member of the mainly Christian “anti-balaka” (anti-machete) militia trains in the Boeing neighbourhood of Bangui, Central African Republic, on February 24, 2014. (Photo by Fred Dufour/AFP Photo)

A rebel fighter fires towards pro-regime forces during clashes in Sheikh Najar area of the restive Syrian city of Aleppo on February 24, 2014. (Photo by Zein Al-Rifai/AFP Photo/Aleppo Media Centre)

Demonstrators roll tires to build a barricade and block a bridge during protests against Nicolas Maduro's government in San Cristobal, about 410 miles (660 km) southwest of Caracas, February 26, 2014. Pope Francis called on Wednesday for an end to violence in Venezuela that has killed at least 13 people and urged politicians to take the lead in calming the nation's worst unrest for a decade. The banner reads, “Resistance”. (Photo by Carlos Garcia Rawlins/Reuters)

An Afghan shopkeeper boils milk as he waits for customers at dawn in Jalalabad, Nangarhar province on February 28, 2014. (Photo by Noorullah Shirzada/AFP Photo)

A handout picture released by the United Nation Relief and Works Agency (UNRWA) on February 26, 2014 shows residents of Syria's besieged Yarmuk Palestinian refugee camp, south of Damascus, crowding a destroyed street during a food distribution led the UN agency, on January 31, 2014. (Photo by AFP Photo/UNRWA)

Members of last year's winner Unidos de Vila Isabel samba school dance during the final technical reheasal at the Sambodromo in Rio de Janeiro, Brazil on Februrary 23, 2014. The peak of Rio's carnival will be on March 2 and 3, 2014. (Photo by Yasuyoshi Chiba/AFP Photo)

A Syrian fruit vendor waits for customers next to a damaged building on February 24, 2014 in the Shaar neighborhood of the northern city of Aleppo. (Photo by Mohammed Al-Khatieb/AFP Photo)

An Israeli undercover policeman point his gun while Israeli undercover policemen arrest a Palestinian stone thrower during clashes following Friday prayers at the east Jerusalem neighbourhood of Ras Al Amud, on 28 February 2014. Several Palestians were arrested for stone throwing at the Jerusalem Old City area after the Israeli Police restricted the entrance to the Al-Aqsa mosque and permitted only men over the age of 50. (Photo by Abir Sultan/EPA)

People view floral tributes to anti-government demonstrators killed in clashes with police in Independence Square on February 23, 2014 in Kiev, Ukraine.Prime Minister Yanukovych is said to have left Kiev for a eastern stronghold as the country's parliament voted to remove Yanukovych from office and call for new elections. (Photo by Jeff J. Mitchell/Getty Images)

Particpants take part in the Auckland Pride Parade along Ponsonby Road on February 22, 2014 in Auckland, New Zealand. The Pride Parade celebrates the Rainbow Community – Lesbian, Gay, Bisexual, Transgender, Takatapui, Intersex and Faafafine in New Zealand. (Photo by Phil Walter/Getty Images)

South Korean (R) and US (L) Marines take a position on the seashore during a joint landing operation by US and South Korean Marines in Pohang, 270 kms southeast of Seoul, on April 26, 2013. The US and South Korea staged a military landing exercise as the Korean peninsula was already engulfed in a cycle of escalating tensions triggered by the North Korea's nuclear test in February. (Photo by Jung Yeon-Je/AFP Photo)

Models present a creation for fashion house Dsquared2 as part of the Milan's Women's fashion week Autumn/Winter 2014 collections on February 24, 2014. (Photo by Tiziana Fabi/AFP Photo)

Undated handout photo issued by Hybrid Air Vehicles Ltd of the world's largest aircraft known as the HAV304 – part plane, part airship and part helicopter – which has been unveiled in the UK in all its 300ft (91m) long glory. The giant aircraft has been displayed at Cardington in Bedfordshire in the only hangar big enough to accommodate the 113ft (34m) wide and 85ft (26m) high monster. Created by Hybrid Air Vehicles Ltd and first flown in the USA, the ultra-green HAV304 project has just received a £2.5 million grant from the UK Government. See PA story AIR Airship. (Photo by Hybrid Air Vehicles Ltd/PA Wire)

Iron Maiden front man Bruce Dickinson stands alongside the world's largest aircraft known as the HAV304, at its launch at Cardington Hanger in Bedfordshire, on February 28, 2014. (Photo by Chris Radburn/PA Wire)

Workers sit by a part of a float at a samba school warehouse on February 24, 2014 in Rio de Janeiro, Brazil. Carnival officially begins on February 28 but pre-festivities have already begun. Brazil is gearing up to host the 2014 FIFA World Cup. (Photo by Mario Tama/Getty Images)

A couple wearing wedding costumes races with heart-shaped balloons in the Tokyo Marathon Tokyo Sunday, February 23, 2014. (Photo by Eugene Hoshiko/AP Photo)

A Muslim supporter of India's ruling Congress party Vice President Rahul Gandhi holds the hand of Gandhi during his road show campaigning for the parliamentary elections, in Nagaon, India, Wednesday, February 26, 2014. The general elections are scheduled to be held later this year. (Photo by Anupam Nath/AP Photo)

Queen and princess of the “Rua do Mercado” band carnival parade in Rio de Janeiro, Brazil, Thursday, February 27, 2014. People gathered Thursday for one of many parades before the official start of Carnival on February 28. (Photo by Silvia Izquierdo/AP Photo)

Crimean Tatars clash with a police officer, left, in front of a local government building in Simferopol, Crimea, Ukraine, Wednesday, February 26, 2014. About 20,000 Muslim Tatars who rallied in support of the interim government clashed with a smaller pro-Russian rally. Fistfights broke out between pro- and anti-Russian demonstrators in Ukraine's strategic Crimea region on Wednesday as Russian President Vladimir Putin ordered massive military exercises just across the border. (Photo by Andrew Lubimov/AP Photo)

A man carries a woman affected by tear gas launched by riot police at anti-government protesters in Caracas, Venezuela, Saturday, February 22, 2014. After their opposition rally broke up in the late afternoon, in a pattern that has been seen in past demonstrations about 1,000 stragglers erected barricades of trash and other debris and threw rocks and bottles at police and National Guardsmen. The troops responded with volleys of tear gas to prevent the students from reaching a highway and blocking traffic. (Photo by Rodrigo Abd/AP Photo)

This January 30, 2014 photo made available by NASA on February 25, 2014, shows North Korea, darker area at center, between South Korea, right, and China, left. Lights from the North Korean capital, Pyongyang, are visible at center. The image comparing the night time lights of the countries was made by the Expedition 38 crew aboard the International Space Station. (Photo by NASA)

Thai police commandos take a rest during an anti terrorist exercise at Crime Suppression Division in Bangkok, Thailand, Wednesday, February 26, 2014. Violence spread Tuesday to another anti-government protest site in Thailand's capital following weekend explosions that left five people dead, including four children, security officials said. (Photo by Sakchai Lalit/AP Photo)

Kyle Larson (42) starts a multi-car collision between Turn 3 and Turn 4 with Austin Dillon (3), Jamie McMurray (1), Casey Mears, Marcos Ambrose (9), Kasey Kahne (5), Michael Annett (7) and Brain Vickers (55) during the NASCAR Daytona 500 auto race at Daytona International Speedway in Daytona Beach, Fla., Sunday, February 23, 2014. (Photo by Phelan M. Ebenhack/AP Photo)