An anti-nuclear protester shows off his owl during a march in front of Tokyo Electric Power Co.'s (TEPCO) headquarters in Tokyo April 10, 2011. The placard attached to the owl reads, "We don't want to die just yet". A TEPCO executive apologised on Saturday for spreading radiation into the air and sea as regulators said the pumping of radioactive water into waters off Japan from a crippled nuclear plant would end one day later than planned. REUTERS/Issei Kato (JAPAN - Tags: DISASTER ENERGY ENVIRONMENT POLITICS CIVIL UNREST) 

An anti-nuclear demonstrator takes part during protest action in Berlin March 26, 2011. Tens of thousands of people are expected nationwide on Saturday at anti-nuclear demonstrations organized in Berlin, Hamburg, Munich and Cologne. REUTERS/Pawel Kopczynski (GERMANY - Tags: CONFLICT ENERGY POLITICS) 

An anti-nuclear demonstrator wearing a mask takes part in a protest action in Berlin, March 26, 2011. Tens of thousands of people are expected nationwide at today's anti-nuclear demonstrations organized in Berlin, Hamburg, Munich and Cologne. REUTERS/Thomas Peter (GERMANY - Tags: CONFLICT) 

Iodine tablets are displayed during a nuclear radiation decontamination drill at the Tri-Service General Hospital in Taipei March 18, 2011, in reaction to the nuclear crisis in Japan after a huge earthquake crippled several reactors at the Fukushima Daiichi nuclear power complex, raising fears of an uncontrolled radiation leak. REUTERS/Pichi Chuang (TAIWAN - Tags: DISASTER ENVIRONMENT HEALTH ENERGY) 

South Coast Air Quality Management District's Radnet sampler, which is monitoring the level of radioactive particles, is shown in Anaheim, California March 17, 2011. Small amounts of radioactive isotope from Japanese nuclear power stations are expected to hit Southern California late Friday. REUTERS/Lucy Nicholson (UNITED STATES - Tags: ENVIRONMENT DISASTER) 

A general view of the sarcophagus covering the damaged fourth reactor at the Chernobyl nuclear power plant February 24, 2011. Belarus, Ukraine and Russia will mark the 25th anniversary of the nuclear reactor explosion in Chernobyl, the place where the world's worst civil nuclear accident took place, on April 26. REUTERS/Gleb Garanich (UKRAINE - Tags: DISASTER ENERGY ANNIVERSARY) 

A sign forbidding the gathering of mushrooms, picking berries and fishing is seen in front of an abandoned school in the village of Muslyumovo November 18, 2010. The village is located on the banks of the Techa river in Russia's Urals, one of the country's most lethal nuclear dumping grounds. The Mayak nuclear complex located 30 km (18 miles) from Muslyumovo, currently processing foreign radioactive wastes, dumped 76 million cubic metres (2.68 billion cubic feet) of highly radioactive waste into the river from 1949 to 1956. Picture taken November 18, 2010. REUTERS/Denis Sinyakov (RUSSIA - Tags: HEALTH DISASTER ENVIRONMENT) 

A warning sign for radioactive materials is seen in the warehouse for 'Castor' containers at 'Zwischenlager Gorleben' temporary nuclear waste storage facility in the northern German village of Gorleben near Dannenberg August 5, 2010. The storage facility was constructed to hold about 420 Castor containers of highly radioactive reprocessed German nuclear waste. Sign reads : 'Controlled Area. Warning Radiation' REUTERS/Morris Mac Matzen (GERMANY - Tags: ENERGY) 

A jumbo jet takes off shortly before midday from Heathrow Airport in west London April 15, 2010. A huge cloud of ash from a volcano in Iceland turned the skies of northern Europe into a no-fly zone on Thursday, leaving hundreds of thousands of passengers stranded. No flights are allowed in British air space, except in emergencies, from 12 p.m. until at least 6 p.m. as the ash spreads across the country, the National Air Traffic Service (NATS) said.REUTERS/Toby Melville (BRITAIN - Tags: TRANSPORT ENVIRONMENT TRAVEL) 

A pigeon rests on a sign at the beach in Tel Aviv January 19, 2010. REUTERS/Baz Ratner (ISRAEL - Tags: ANIMALS ODDLY) 

Road signs are seen alongside the main motorway linking Athens to northern Thessaloniki near Thiva town where works are in progress near Thiva town, north of Athens January 18, 2010. Greece is among the European countries with the highest death rate in road accidents. REUTERS/Yiorgos Karahalis (GREECE - Tags: SOCIETY TRANSPORT) 

A column of ash shoots up into the sky in a mild eruption of the Mayon volcano in Cagsawa town, Albay province, south of Manila December 27, 2009. The Philippines most active volcano shot higher ash columns and rumbled louder on Wednesday as authorities warned of a potential hazardous eruption in Mount Mayon anytime. REUTERS/Romeo Ranoco (PHILIPPINES - Tags: ENVIRONMENT DISASTER) 

A raven stretches its wings as it sits on a post inside the 30 km (18 miles) exclusion zone around the Chernobyl nuclear reactor near the village of Babchin, some 370 km (217 miles) southeast of Minsk, December 23, 2009. The sign reads: "Radiation hazard". REUTERS/Vasily Fedosenko (BELARUS - Tags: ANIMALS ENVIRONMENT DISASTER) 

Cans with the nuclear sign are stacked during a demonstration in Colmar October 3, 2009. Some five thousand demonstrators from France, Germany, and Switzerland on Saturday demanded the closure of France's oldest nuclear plant, Fessenheim, which is located at the French-German border. REUTERS/Vincent Kessler (FRANCE ENERGY ENVIRONMENT CONFLICT) 

A young girl stacks cans labelled with nuclear signs during a demonstration in Colmar October 3, 2009. Some five thousand demonstrators from France, Germany, and Switzerland on Saturday demanded the closure of France's oldest nuclear plant, Fessenheim, which is located at the French-German border. REUTERS/Vincent Kessler (FRANCE ENERGY ENVIRONMENT CONFLICT) 

A technician poses for the media with a test tube for testing against pandemic influenza A (H1N1) virus in the national reference laboratory at the Robert Koch scientific institute in Berlin, October 2, 2009. REUTERS/Fabrizio Bensch (GERMANY HEALTH SCI TECH) 

A seagull stands on top of a sign in Aberdeen docks, in Aberdeen in Scotland, September 25, 2009. REUTERS/Russell Cheyne (BRITAIN ENVIRONMENT) 

A biohazard sign on a sample box is seen at the County of San Diego Health and Services Agency in San Diego, California April 26, 2009. The United States declared a public health emergency on Sunday because of an outbreak of swine flu that has been diagnosed in 20 people in this country -- the same strain suspected of killing 81 people in Mexico. REUTERS/MikeBlake (UNITED STATES HEALTH SOCIETY SCI TECH ENVIRONMENT) 

A warning sign hangs on a door at the County of San Diego Health and Services Agency in San Diego, California April 26, 2009. Governments around the world rushed on Sunday to check the spread of a new type of swine flu that has killed up to 81 people in Mexico and infected around a dozen in the United States
REUTERS/MikeBlake (UNITED STATES ENVIRONMENT HEALTH SOCIETY SCI TECH) 

A bag used to hold chemotherapy drugs is pictured at a patient's home in Burbank,California March 16, 2009. REUTERS/Fred Prouser (UNITED STATES HEALTH SCI TECH) 

Greenpeace environmental activists hold a banner atop of barrels and animal dung during a protest against nuclear power in front of an office of German energy company EnBW in Berlin March 4, 2009. The banner reads 'Electric power companies: Who produced nuclear power has to pay for it!' REUTERS/Fabrizio Bensch (GERMANY) 

A red sign warning of mines rests in a land-mine field in the outskirts of Cambodia's western city Battambang on February 12, 2009. Cambodia is one of the most heavily mined countries in the world. REUTERS/Adrees Latif (CAMBODIA) 

Environmental activists protest outside BHP's Annual General Meeting in Melbourne November 27, 2008. BHP, facing its shareholders for the first time since walking away from the Rio bid on November 25, 2008, told its Australian annual meeting that uncertainty in commodities markets would continue in the short term and it was ready to close loss-making operations. REUTERS/Brandon Malone (AUSTRALIA) 

Police secure the scene after a bomb blast at the police headquarters in Islamabad October 9, 2008. A car bomb attack wounded at least eight people on Thursday at police headquarters in the Pakistani capital of Islamabad, a senior police official said. REUTERS/Mian Khursheed (PAKISTAN) 

The sun is seen during a total solar eclipse in Gaotai, Gansu province August 1, 2008. REUTERS/Aly Song (CHINA) 

An anti-personnel mine is seen on the Jordanian side of the Jordan-Syria Jaber border July 31, 2008. Thousands of landmines have been removed in Jordan, and concerned parties aim to remove those left by 2009, the date set by the Ottawa Agreement signed by Jordan in 1999. REUTERS/Majed Jaber (JORDAN) 

A sign is seen outside the reactor at the Atomic Energy Canada Limited (AECL) Chalk River nuclear facility during a media tour in Chalk River, Ontario December 19, 2007. REUETRS/Chris Wattie (CANADA) 

Cans with stop nuclear signs on them, are piled up during a demonstration against the construction of new nuclear power plants, in parliament square in Bern September 8, 2007. REUTERS/Pascal Lauener (SWITZERLAND) 

A cross is covered with the names of migrants killed on their way to the U.S. at a migrant shelter in the small town of Altar, about 60 miles (97km) south of the U.S.-Mexico border in the Mexican state of Sonora, July 27, 2007. Illegal immigration touches almost every aspect of life in the town of Altar, a clearing house for half a million people a year hoping to cross the Sonoran Desert into the United States. To match feature MEXICO-US/IMMIGRATION REUTERS/Tomas Bravo (MEXICO) 

The Quadriga on top of Berlin's landmark Brandenburg Gate is silhouetted against a cloudy summer evening sky in Berlin August 3, 2007. REUTERS/Fabrizio Bensch (GERMANY) 

The cross of the chapel at the border transit camp in the central German village of Friedland is pictured here on June 22, 2007. Primarily established by the British military administration in 1945 as first place of asylum for refugees, displaced persons, returning prisoners of war and ethnic German repatriates after World War Two, 'Lager Friedland' today is the last remaining camp of initial reception for repatriates from the former Soviet Union with a capacity to house 10,000 persons. REUTERS/Alex Grimm (GERMANY) 

A no smoking sign on the table inside a cafe is pictured as a man smokes outside in Berlin May 11, 2007. REUTERS/Hannibal Hanschke (GERMANY) 

People walk past a building protected by a surveillance system in London November 2, 2006. Britain is becoming a surveillance society where individuals are filmed hundreds of times a day by CCTV and where companies "data mine" to build up profiles on customers, the Information Commissioner warned on Thursday. REUTERS/Luke MacGregor (BRITAIN) 

An employee of a Russian nuclear research centre, the Kurchatov Institute, is seen through the window of a laboratory door during a tour of the centre in Moscow October 24, 2006. REUTERS/Sergei Karpukhin (RUSSIA) 

A car (L) destroyed in a traffic accident is displayed by the Qinghai-Tibet highway to remind drivers to drive safely in Huangyuan County, northwestern China's Qinghai province, August 18, 2006. The sign reads "Cherish your life, drive carefully". REUTERS/Jason Lee (CHINA) 

A protester wearing a protective suit is seen through a banner bearing the 'radioactive' sign during a demonstration in Moscow December 13, 2005. The event was staged in protest of radioactive debris and fittings from the Chernobyl nuclear power plant, which the organisers fear could end up on Russian territory. REUTERS/Sergei Karpukhin Pictures of the Month December 2005 

Feeder bands from Hurricane Rita cross over a church in Haulover Beach, Florida, September 20, 2005. Tropical Storm Rita strengthened into a hurricane on Tuesday and lashed the low-lying islands of the Florida Keys with gusty squalls and heavy rain. All 80,000 residents had been ordered out of the Keys on Monday but many stayed behind in boarded-up homes to await Rita's arrival. REUTERS/Marc Serota MS/AT 

Sign placed on a side road warns locals to beware of landmines in Stanley on September 6, 2005. Most of the 150 minefields were laid around Stanley when the Argentine forces landed there on April 2, 1982 to claim the islands taken by the British in 1833. British forces defeated the Argentines 10 weeks later in a brutal war that killed 650 Argentines and 250 British. Some mines were cleared right after the conflict in a joint British-Argentine effort. Today there are 117 minefields left, 87 of them in the Stanley area where two-thirds of the islands' 2,900 people live. Picture taken September 6. To match feature Falklands-Mines. REUTERS/Enrique Marcarian 

Signs placed on a side road warn locals to steer clear from land mines in Stanley on September 6, 2005. Most of the 150 minefields were laid around Stanley when the Argentine forces landed there on April 2, 1982 to claim the islands taken by the British in 1833. British forces defeated the Argentines 10 weeks later in a brutal war that killed 650 Argentines and 250 British. Some mines were cleared right after the conflict in a joint British-Argentine effort. Today there are 117 minefields left, 87 of them in the Stanley area where two-thirds of the islands' 2,900 people live. Picture taken September 6. To match feature Falklands-Mines. REUTERS/Enrique Marcarian 

A sign is seen on a side road warning locals to steer clear from land mines which were laid in the Falkland Islands, in Stanley September 6, 2005. Most of the 150 minefields were laid around the capital Stanley when Argentine forces landed there in April 1982 to claim the islands taken by the British in 1833. The British armed forces defeated the Argentines 10 weeks later in a brutal war that killed 650 Argentines and 250 British. Picture taken September 9. REUTERS/Enrique Marcarian 

Crosses at a village cemetery are seen during a forest fire in the Acor's mountain range in Arganil, central Portugal, July 21, 2005.Portugal, gripped by its worst drought in at least 60 years, sent hundreds of fire fighters to battle blazes across the country on Thursday and warned of economic fallout to the parched agricultural sector. REUTERS/Nacho Doce ND/YH 

A Belarussian opposition protestor with a covered face attends a rally in central Minsk April 26, 2005. Police in ex-Soviet Belarus on Tuesday detained more than two dozen protesters who tried to present a petition to President Alexander Lukashenko on the 19th anniversary of the Chernobyl nuclear disaster. Belarus's small opposition, which accuses Lukashenko of systematically violating human rights, traditionally stages its largest protest of the year on the anniversary of the accident which contaminated a quarter of the country's territory. Reuters/Vasily Fedosenko Pictures of the Month April 2005 VF/CVI/VP/PEK 

A lion is seen passing in front of a zebra in Kenya's national park Masai Mara in this March 2004 file photo. Even the King of the Jungle needs a hand staying alive on his own turf. That is what the government of Kenya thinks as far as the majestic African lion, a symbol of the continent and one of its most feared predators, is concerned. The Kenya Wildlife Service is pushing the Convention on International Trade in Endangered Species (CITES), to give the African lion, panthera leo, its most protected status. Current conservative estimates place the African lion population at 23,000, Kenya wrote in its proposal. Picture taken on March 2004. FEATURE-MATCHER REUTERS/Radu Sigheti RSS/THI 

An elderly man puts on his goggles as he prepares to enter massive surf at Sydney's Narrabeen Bech February 26, 2004. Huge swells, not seen in many months, hit Sydney's beaches overnight as a result of a strong winds combined with a low-pressure cell off the east coast of Australia. REUTERS/David Gray PP04030068 Pictures of the month February 2004 DG 

An aeroplane comes into land before the start of a one-day strike at Rome's Fiumicino Airport January 19, 2004. A strike by employees at Italian state-controlled airline Alitalia forced the cancellation of 364 flights on Monday, putting further pressure on the debt-laden carriers balance sheet. The second official walkout since the company presented its three-year plan in October, brought travel woe to some 18,000 passengers.