US president Barack Obama (2nd left) and vice president Joe Biden (left), along with members of the national security team, receive an update on the mission against Osama bin Laden in the situation room of the White House, May 1st, 2011. REUTERS/White House/Pete Souza

Britain’s Prince William and his wife Catherine, Duchess of Cambridge kiss on the balcony at Buckingham Palace, watched by bridesmaids Grace van Cutsem (left) and Margarita Armstrong-Jones and pageboy Tom Pettifer, after their wedding in Westminster Abbey, in central London April 29th, 2011. REUTERS/Dylan Martinez

Police spray Ugandan opposition party leaders with coloured water during demonstrations in Kampala, May 10th, 2011. REUTERS/James Akena

French president Nicolas Sarkozy and German chancellor Angela Merkel gesture as they address a news conference at the Chancellery in Berlin June 17th, 2011. REUTERS/Fabrizio Bensch

The race car of driver Will Power (left) goes airborne during the IZOD IndyCar World Championship race at the Las Vegas Motor Speedway in Las Vegas, Nevada on October 16th, 2011. REUTERS/Barry Ambrose

Covered corpses are seen on the shore of the small, wooded island of Utoeya July 23rd, 2011, after a suspected right-wing Christian gunman in police uniform killed at least 84 people in a ferocious attack on a youth summer camp of Norway’s ruling Labour party, and hours after a bomb killed seven in Oslo. REUTERS/Fabrizio Bensch

Venus Williams of the US serves to Sandra Zahlavova of the Czech Republic during their match at the Australian Open tennis tournament in Melbourne January 19th, 2011. REUTERS/David Gray

US president Barack Obama raises a toast with first lady Michelle Obama in Ollie Hayes Pub in Obama’s ancestral home in Moneygall on May 23rd. REUTERS/Maxwell’s

- Manchester United’s Wayne Rooney celebrates after scoring a goal during the first leg of their Champions League quarter final soccer match against Chelsea at Stamford Bridge in London April 6th, 2011. REUTERS/Dylan Martinez

US director Woody Allen reacts during the shooting of his movie “The Bop Decameron” in downtown Rome July 11th, 2011. REUTERS/Alessandro Bianchi

People roll and drag water containers in Wajir in this recently taken handout photo released on July 21st, 2011. A wide swathe of east Africa, including Kenya and Ethiopia, has been hit by years of severe drought and the United Nations says two regions of southern Somalia are suffering the worst famine for 20 years, with 3.7 million people facing starvation. REUTERS/Jakob Dall/Danish Red Cross

The International Space Station is seen with the docked space shuttle Endeavour in this May 23rd, 2011 handout photo courtesy of NASA. The photo was taken by Expedition 27 crew member Paolo Nespoli from the Soyuz TMA-20 following its undocking and is the first-ever image of a space shuttle docked to the International Space Station. REUTERS/NASA/

Robert Peraza, who lost his son Robert David Peraza, pauses at his son’s name at the North Pool of the 9/11 Memorial during tenth anniversary ceremonies at the site of the World Trade Center in New York, September 11th, 2011. REUTERS/Justin Lane

A woman cries while sitting on a road amid the destroyed city of Natori, Miyagi Prefecture in northern Japan March 13th, 2011, following a massive earthquake and tsunami. REUTERS/Asahi Shimbun.

A demonstrator shows his bottom to riot police during a protest by European workers and trade union representatives to demand better job protection in the European Union countries in Brussels March 24th, 2011. REUTERS/Thierry Roge

An Asian elephant sprays sand in its enclosure at the zoo in Karlsruhe July 7th, 2011. REUTERS/Alex Domanski

Policemen carry the bodies of victims retrieved from the debris in Rikuzentakata, Iwate Prefecture, days after the area was devastated by a magnitude 9.0 earthquake and tsunami, March 16th, 2011. REUTERS/Adrees Latif

Thousands of starlings flock above farmland near Eleftheroupolis, Greece on January 3rd, 2011. REUTERS/Yannis Behrakis

Vacansoleil-DCM rider Johnny Hoogerland of the Netherlands climbs over a barbed wire fence after crashing during the ninth stage of the Tour de France 2011 from Issoire to Saint-Flour July 10th, 2011. REUTERS/Stringer

Fans watch and take photos of Rafael Nadal of Spain as he towels off after defeating compatriot Feliciano Lopez at the Sony Ericsson Open tennis tournament in Key Biscayne, Florida on March, 28th, 2011. REUTERS/Hans Deryk

A man watches a partial solar eclipse through a filter in Galyatetot, Hungary on January 4th, 2011. REUTERS/Bernadett Szabo.

People are rescued after being trapped under debris following an earthquake in a village near Van in Turkey October 23rd, 2011. REUTERS/Ali Ihsan Ozturk /Anadolu Agency

A plane flies through the “Tribute in Lights” in lower Manhattan in New York September 10th, 2011. REUTERS/Eric Thayer

Lightning flashes around the ash plume of the Puyehue-Cordon Caulle volcano chain near Entrelagos, Chile on June 5th, 2011. REUTERS/Carlos Gutierrez

A policeman detains an opposition activist in Baku, Azerbaijan on March 12th, 2011. Police arrrested more than 30 activists of the opposition Musavat Party when its members took to the street of Baku to protest against the ruling elite following a similar rally a day before. REUTERS/Orhan Orhanov

A car bomb explodes as a member of a Thai bomb squad examines it in Narathiwat province, south of Bangkok, Thailand on July 1st, 2011. The bomb planted by suspected insurgents wounded the squad member, police said. REUTERS/Stringer

Supporters of Yemen’s president Ali Abdullah Saleh stand on pillars during a rally to show their support, in Sanaa on April 1st, 2011. REUTERS/Khaled Abdullah

A girl in isolation for radiation screening looks at her dog through a window in Nihonmatsu, Japan on March 14th, 2011, following the massive earthquake and tsunami. REUTERS/Yuriko Nakao

Anti-Gadafy fighters fire a multiple rocket launcher near the Libyan town of Sirte, one of Muammar Gadafy’s last remaining strongholds, September 24th, 2011. REUTERS/Goran Tomasevic