U.S. Secretary of State Hillary Rodham Clinton, left, and West Bengal Chief Minister Mamata Banerjee greet each other before a meeting in Kolkata, India, Monday, May 7, 2012. Clinton met with Banerjee, a key partner of India's ruling coalition who has stymied government efforts to lift restrictions on foreign-owned investments in the country. (AP Photo/Bikas Das) A tall steel cross is refracted in rain drops on a window in Joplin, Mo., Monday, May 7, 2012. The cross is all that is left standing of St. Mary's Catholic Church, which was destroyed by an EF-5 tornado that tore through a large swath of the city and killed 161 people nearly a year ago. (AP Photo/Charlie Riedel) Horses are seen on the track as lightning strikes before the 138th running of the Kentucky Oaks horse race at Churchill Downs Friday, May 4, 2012, in Louisville, Ky. (AP Photo/Matt Slocum) A priest sprinkles holy water to the coffins containing the bodies of photojournalists Gabriel Huge, bottom, and Guillermo Luna, during a public mass in Veracruz, Mexico, Friday, May 4, 2012. Killed by unknown assailants, the bodies were found dumped together in plastic bags by a canal in the eastern Mexican state of Veracruz on Thursday, less than a week after the killing of a reporter for an investigative newsmagazine. (AP Photo/Felix Marquez) Republican presidential candidate, former Massachusetts Gov. Mitt Romney speaks at a town hall-style meeting in Euclid, Ohio, Monday, May 7, 2012. (AP Photo/Jae C. Hong) England's Ronnie O'Sullivan holds the trophy as he celebrates his victory with his son Ronnie after the Final of the World Snooker Championships at the Crucible Theatre, Sheffield, England, Monday May 7, 2012. O'Sullivan defeated Ali Carter 18 frames to 11. (AP Photo/PA, Anna Gowthorpe) UNITED KINGDOM OUT NO SALES NO ARCHIVE England's Ronnie O'Sullivan holds the trophy as he celebrates his victory with his son Ronnie after the Final of the World Snooker Championships at the Crucible Theatre, Sheffield, England, Monday May 7, 2012. O'Sullivan defeated Ali Carter 18 frames to 11. (AP Photo/PA, Anna Gowthorpe) UNITED KINGDOM OUT NO SALES NO ARCHIVE Russia's President Vladimir Putin controls the puck during the All-Russian ice hockey festival among amateur teams at Megasport Arena in Moscow, Monday, May 7, 2012. Putin played for Team of the Russian Amateur Ice Hockey League, which competed with the Russian Legends Team. (AP Photo/Sergei Karpukhin, pool) Russia's President Vladimir Putin, left, talks to a referee during the All-Russian ice hockey festival among amateur teams at Megasport Arena in Moscow, Monday, May 7, 2012. Putin played for Team of the Russian Amateur Ice Hockey League, which competed with the Russian Legends Team. (AP Photo/Sergei Karpukhin, pool) Republican presidential candidate, former Massachusetts Gov. Mitt Romney walks past an arrow mark at a town hall-style meeting in Euclid, Ohio, Monday, May 7, 2012. (AP Photo/Jae C. Hong) A "welcome back" balloon is tied to the mailbox at the farm of Marian Thompson near Zanesville, Ohio Friday, May 4, 2012. The Columbus Zoo returned five exotic animals to Thompson, the survivors of 56 animals her late husband, Terry Thompson, released from the eastern Ohio farm on Oct. 18, 2011, before he committed suicide. Fearing for the public's safety, authorities killed 48 of the animals. (AP Photo/Mark Duncan) A bear, lower left, explores its cage on the farm of Marian Thompson near Zanesville, Ohio, after it was released to Thompson by the Columbus Zoo Friday, May 4, 2012. Terry Thompson, Marian's late husband, released 56 animals — including black bears, mountain lions and Bengal tigers — from his eastern Ohio farm on Oct. 18, 2011, before he committed suicide. Fearing for the public's safety, authorities killed 48 of the animals. (AP Photo/Mark Duncan) Chuck Kenney, from Goodells, Mich., places a bet before the 138th running of the Kentucky Oaks horse race at Churchill Downs Friday, May 4, 2012, in Louisville, Ky. (AP Photo/Charlie Riedel) Rachel Ford, from Louisville, Ky., waits for the running of the 138th running of the Kentucky Oaks horse race at Churchill Downs Friday, May 4, 2012, in Louisville, Ky. (AP Photo/Mark Humphrey) (Austria's artist Hermann Nitsch speaks during an interview with The Associated Press) at the Superior Art Institute in Havana, Cuba, Monday, May 7, 2012. Nitsch is in Cuba to attend the Havana Biennial Art Exhibition in May and June. (AP Photo/Javier Galeano) Guillermo Garcia-Lopez from Spain and Marcos Baghdatis from Cyprus help a chair umpire who fainted during a Madrid Open tennis tournament match, in Madrid, Monday, May 7, 2012. (AP Photo/Andres Kudacki) Protesters take shelter during brick throwing clashes outside the Ministry of Defense in Cairo, Egypt, Friday, May 4, 2012. Egyptian armed forces and protesters clashed in Cairo on Friday, with troops firing water cannons and tear gas at demonstrators who threw stones as they tried to march on the Defense Ministry, a flashpoint for a new cycle of violence only weeks ahead of presidential elections. (AP photo/Hamada Elrasam) Athletes compete in a women's 400m hurdles heat during the British Universities and Colleges Sport (BUCS) Athletics Championship at the Olympic Stadium in the Olympic Park in London, Friday, May 4, 2012. This is the first real test event to be held at the Olympic Stadium, ahead of the upcoming summer games. (AP Photo/Sang Tan) A man looks at a shoe set on fire as Palestinians and pro-Palestinian Turks stage a protest in solidarity with Palestinian prisoners in Israeli jails outside the Israeli embassy residence in Ankara, Turkey, Friday, May 4, 2012.(AP Photo/Burhan Ozbilici) France's incumbent President and Union for a Popular Movement (UMP) party candidate for the French 2012 presidential election, Nicolas Sarkozy, strolls along the sea front after his last campaign meeting in Les Sables-d'Olonne, western France, Friday, May 4, 2012, two days ahead of the second round of the French presidential elections. (AP Photo/Erci Feferberg, Pool) A Pakistani worker decorates a canal with artificial flowers, in Lahore, Pakistan, Monday, May 7, 2012. (AP Photo/K.M. Chaudary) An Afghan refugee girl, center, returns home carrying a basket on her head in a slum area on the outskirts of Islamabad, Pakistan, Monday, May 7, 2012. (AP Photo/Muhammed Muheisen) A Pakistani boy, bottom left, looks at a mechanic working outside his shop in Rawalpindi, Pakistan, Monday, May 7, 2012. (AP Photo/Muhammed Muheisen) Francois Hollande, French Socialist Party candidate for the 2012 presidential election, waves to supporters prior to delivering his speech during a campaign rally in Forbach, eastern France, Friday, May 4, 2012. (AP Photo/Francois Mori) Brazil's former President Luiz Inacio Lula da Silva puts on his hat at the end of a ceremony where he received five honorary degrees from several universities, in Rio de Janeiro, Brazil, Friday, May 4, 2012. (AP Photo/Felipe Dana) Greece's conservative leader of New Democracy Antonis Samaras arrives at the headquarters of his party in Athens, Monday, May 7, 2012. With no party able to govern alone, Samaras, whose pro-austerity party came first in national elections but fell well short of a ruling majority, is now trying to form a new coalition government. Samaras has three days in which to build an alliance, after receiving the formal mandate from President Karolos Papoulias Monday. (AP Photo/Thanassis Stavrakis) Greece's conservative leader of New Democracy's Antonis Samaras arrives at the headquarters of his party in Athens, Monday, May 7, 2012. With no party able to govern alone, Samaras, whose pro-austerity party came first in national elections but fell well short of a ruling majority, is now trying to form a new coalition government. Samaras has three days in which to build an alliance, after receiving the formal mandate from President Karolos Papoulias Monday. (AP Photo/Thanassis Stavrakis) An Army carry team moves a transfer case containing the remains of Capt. Gregory L. Childs on Monday, May 7, 2012 at Dover Air Force Base, Del. According to the Department of Defense, Childs, of Warren, Ark., died in Afghanistan while supporting Operation Enduring Freedom. (AP Photo/Steve Ruark) A keeper walks camel Laila with a broken leg at a horse clinic in Berlin, Germany, Friday, May 4, 2012. Laila broke her leg on a meadow of the breeding farm of her owner two weeks ago and had to undergo two hours of medical surgery. The animal now has to learn to walk as it will wear the plaster for six weeks. (AP Photo/dapd, Paul Zinken) (Lee Jin-man | The Associated Press) Will Smith poses upon his arrival for a press conference to promote his new movie "Men in Black III" in Seoul, South Korea on Monday. A woman shows her companions a newspaper which carries a picture of President-elect Francois Hollande on the front page in a shop in Paris Monday May 7, 2012. France handed the presidency Sunday to leftist Hollande, a champion of government stimulus programs who says the state should protect the downtrodden, a victory that could deal a death blow to the drive for austerity that has been the hallmark of Europe in recent years. Text on the shop window reads "open 7 days a week". (AP Photo/Laurent Cipriani) The Trocadero, bottom left, is reflected in the window of a kiosk which displays the cover of a magazine with a picture of president-elect Francois Hollande in Paris Monday May 7, 2012. France handed the presidency Sunday to leftist Hollande, a champion of government stimulus programs who says the state should protect the downtrodden, a victory that could deal a death blow to the drive for austerity that has been the hallmark of Europe in recent years. (AP Photo/Laurent Cipriani) Serena Williams from U.S. returns the ball to Elena Vesnina from Russia during the Madrid Open tennis tournament, in Madrid, Monday, May 7, 2012. (AP Photo/Daniel Ochoa de Olza) Greece's Socialist PASOK leader Evangelos Venizelos delivers a statement after his meeting with Greece's conservative leader of New Democracy Antonis Samaras at the Greek Parliament in Athens, Monday, May 7, 2012. Greece faces weeks of political turmoil that could scupper its financial bailout after voters angry at crippling income cuts punished mainstream politicians, let a far-right extremist group into Parliament and gave no party enough votes to govern alone. (AP Photo/Petros Giannakouris) A Russian military officer salutes to visitors in a radar station at the missile defense facility in Sofrino, 50 km (31 miles) northeast of Moscow, Russia, Friday, May 4, 2012. Participants in the international conference on missile defense held in Moscow, visited the missile defense facility in Sofrino on Friday. (AP Photo/Mikhail Metzel) In this May 6, 2012 photo, villagers look at the wreckage of car, left, which was destroyed when a huge boulder fell from a mountain, killing six people inside the car and injuring two others in southern province of An Giang, Vietnam. The victims were on a religious pilgrimage. (AP Photo/Tuoi Tre Newspaper, Duc Vinh) A baby monkey clings to the leg of her mother in a park in Kuala Lumpur, Malaysia, Monday, May 7, 2012. (AP Photo/Mark Baker) Egyptian soldiers raise their batons at a protester during clashes outside the Ministry of Defense in Cairo, Egypt, Friday, May 4, 2012. Egyptian armed forces and protesters clashed in Cairo on Friday, with troops firing water cannons and tear gas at demonstrators who threw stones as they tried to march on the Defense Ministry, a flashpoint for a new cycle of violence only weeks ahead of presidential elections. (AP Photo/Ahmed Gomaa) A protester, right, waves a stick at Egyptian soldiers during clashes outside the Ministry of Defense in Cairo, Egypt, Friday, May 4, 2012. Egyptian armed forces and protesters clashed in Cairo on Friday, with troops firing water cannons and tear gas at demonstrators who threw stones as they tried to march on the Defense Ministry, a flashpoint for a new cycle of violence only weeks ahead of presidential elections. (AP Photo/Ahmed Gomaa) Egyptian soldiers surround a downed protester during clashes outside the Ministry of Defense in Cairo, Egypt, Friday, May 4, 2012. Egyptian armed forces and protesters clashed in Cairo on Friday, with troops firing water cannons and tear gas at demonstrators who threw stones as they tried to march on the Defense Ministry, a flashpoint for a new cycle of violence only weeks ahead of presidential elections. (AP Photo/Ahmed Gomaa) Egyptian security forces, unseen, fire a water cannon at protesters during clashes outside the Ministry of Defense in Cairo, Egypt, Friday, May 4, 2012. Egyptian armed forces and protesters clashed in Cairo on Friday, with troops firing water cannons and tear gas at demonstrators who threw stones as they tried to march on the Defense Ministry, a flashpoint for a new cycle of violence only weeks ahead of presidential elections. (AP Photo/Ahmed Gomaa) Children play in a stream to beat the heat in Islamabad, Pakistan on Friday, May 4, 2012. (AP Photo/B.K. Bangash) Vladimir Putin enters St. Andrew's Hall to take the oath of office during his inauguration as new Russia's president in the Grand Kremlin Palace in Moscow on Monday, May 7, 2012. Vladimir Putin has been sworn in as Russia's president for a third term after four years as prime minister. (AP Photo/RIA-Novosti, Alexei Druzhinin, Government Press Service) Russian President Vladimir Putin, left back, and former President Dmitry Medvedev watch a parade of the Kremlin's honor guards in Cathedral Square after the inauguration ceremony at the Kremlin in Moscow on Monday, May 7, 2012. Vladimir Putin has been sworn in as Russia's president for a third term after four years as prime minister. (AP Photo/RIA Novosti Kremlin, Dmitry Astakhov, Presidential Press Service) Thomas Hollande, son of President-elect Francois Hollande arrives at the Socialist Party headquarters in Paris Monday May 7, 2012. France has awoken to a new era after electing Socialist Hollande as president, a leftist pledging to buck Europe's austerity trend and NATO's timetable for Afghanistan. (AP Photo/Michel Spingler) Greek presidential guards perform ceremonial duties at the monument of the unknown soldier in front of the Greek Parliament in Athens, Monday, May 7, 2012. Bailout-reliant Greece faces weeks of financial turmoil after voters angry at crippling income cuts punished mainstream politicians, let a far-right extremist group into Parliament and gave no party enough votes to govern alone. (AP Photo/Thanassis Stavrakis) Iraqi Vice President Tariq Hashemi speaks during a news conference in Istanbul, Turkey, Friday, May 4, 2012.(AP Photo) President-elect Francois Hollande waves from the balcony of the Socialist Party headquarters in Paris Monday May 7, 2012. France has awoken to a new era after electing Socialist Hollande as president, a leftist pledging to buck Europe's austerity trend and NATO's timetable for Afghanistan. (AP Photo/Michel Spingler) French Socialist Party candidate for the 2012 presidential elections Francois Hollande, centre, meets supporters during a tour in Hombourg Haut, eastern France, Friday, May 4, 2012. (AP Photo/Francois Mori) Rory McIlroy, of Northern Ireland, hits from the 10th fairway during the second round of the Wells Fargo Championship golf tournament at Quail Hollow Club in Charlotte, N.C., Friday, May 4, 2012. (AP Photo/Gerry Broome) Dmitry Medvedev meets with lawmakers, members of the ruling United Russia Party in Moscow on Monday, May 7, 2012. The State Duma, lower parliament chamber is scheduled to vote for Dmitry Medvedev as new premier. (AP Photo/RIA Novosti Kremlin, Mikhail Klimentyev, Presidential Press Service) A man waits to enter a voting booth at a polling station in Athens, Greece, Sunday May 6, 2012. Greeks casted ballots on Sunday in their most critical - and uncertain - election in decades, with voters set to punish the two main parties that are being held responsible for the country's dire economic straits. (AP Photo/Kostas Tsironis) An exercise rider works out a race horse during the early morning hours at Churchill Downs Friday, May 4, 2012, in Louisville, Ky. (AP Photo/Charlie Riedel) Kentucky Derby entrant Union Rags yawns during his bath after a morning workout at Churchill Downs Friday, May 4, 2012, in Louisville, Ky. (AP Photo/Charlie Riedel) Police detain protesters in downtown Moscow shortly before Vladimir Putin's inauguration Monday, May 7, 2012. Putin's inauguration on Monday comes a day after an opposition protest drew more than 20,000 people, fewer than the mass demonstrations that preceded his election but still a sign that the anger over Putin's return to the Kremlin has not faded.(AP Photo/Ivan Secretarev) U.S. Secretary of State Hillary Rodham Clinton, left, talks to West Bengal Chief Minister Mamata Banerjee before a meeting in Kolkata, India, Monday, May 7, 2012. Clinton met with Banerjee, a key partner of India's ruling coalition who has stymied government efforts to lift restrictions on foreign-owned investments in the country. (AP Photo/Bikas Das) Tiger Woods watches his shot out of a sand trap on the 11th fairway during the second round of the Wells Fargo Championship golf tournament at Quail Hollow Club in Charlotte, N.C., Friday, May 4, 2012. (AP Photo/Chuck Burton) Pakistani Abla Zahir, 6, sits on the ground holding her brother Yaseen, 1, while waiting to receive a ration of rice during a donated food distribution at the Beri Iman, a shrine of famous Sufi Saint Beri Imam, in Islamabad, Pakistan, Friday, May 4, 2012. (AP Photo/Muhammed Muheisen) The words of the U.S. Constitution are written on the windows in the atrium of Buffalo's recently opened federal courthouse during a formal dedication in Buffalo, N.Y., Thursday, May 3, 2012. The 10-story, $137 million building in the center of downtown has been open since late last year, housing the U.S. District Court, Court of Appeals, U.S. Marshals and other federal agencies. (AP Photo/David Duprey) Serbian police officers escort an arrested ethnic-Albanian, in Belgrade, Serbia, on Friday, May 4, 2012. Serbia's police have arrested 8 people in the tense, ethnic-Albanian dominated south, five of whom on suspicion of war crimes against Serbs during a 2001 conflict. The arrests come ahead of Sunday's general elections pitting pro-EU and nationalist camps. (AP Photo/Darko Vojinovic) An Egyptian protester holds a national flag as he chants slogans at a rally in Tahrir Square in Cairo Egypt, Friday, May 4, 2012. Thousands rallied in Egypt against the country's ruling military council on Friday, two days after a flare-up of street violence left at least nine dead and fueled a wave of Islamist-led opposition to the generals ahead of presidential elections.(AP Photo/Amr Nabil) Egyptian protesters attend the Friday prayer at a rally in Tahrir square in Cairo, Egypt, Friday, May 4, 2012. Thousands rallied in Egypt against the country's ruling military council on Friday, two days after a flare-up of street violence left at least nine dead and fueled a wave of Islamist-led opposition to the generals ahead of presidential elections.(AP Photo/Khalil Hamra) Police detain a protester in downtown St. Petersburg, Russia at the same time Vladimir Putin's inauguration as president in Moscow Monday, May 7, 2012. Putin took the oath of office in a brief Kremlin ceremony on Monday, while on the streets outside thousands of helmeted riot police prevented hundreds of demonstrators from protesting his return to the presidency. (AP Photo/Dmitry Lovetsky) In this Sunday, May 6, 2012 photo taken with a mobile phone camera Alexei Navalny, a prominent anti-corruption whistle blower and blogger, holds an issue of Time Magazine, with his photograph, as he stands behind bars in a prison after he was detained in Moscow. Putin's inauguration on Monday May 7 comes a day after an opposition protest drew more than 20,000 people, fewer than the mass demonstrations that preceded his election but still a sign that the anger over Putin's return to the Kremlin has not faded.(AP Photo/ Maria Baronova ) Russian President Vladimir Putin and former President Dmitry Medvedev, right, speak to each other as an honor guard marches during an inauguration ceremony at the Cathedral Square in the Kremlin in Moscow, Russia, Monday, May 7, 2012. Vladimir Putin took the oath of office for a third term as Russia's president on Monday, saying he considers "service to the fatherland and our nation to be the meaning of my life." (AP Photo/Alexander Zemlianichenko, pool) Photos provided by the FBI show five men arrested Monday, April 30, 2012, and accused of plotting to blow up a bridge near Cleveland, Ohio, the FBI announced Tuesday, May 1, 2012. Top row, from left, are Douglas Wright, Brandon Baxter and Anthony Hayne. Bottom row, from left, are Joshua Stafford and Connor Stevens. There was no danger to the public because the explosives were inoperable and were controlled by an undercover FBI employee, the agency said Tuesday in announcing the men's arrests. The target of the plot was a bridge that carries a four-lane state highway over part of the Cuyahoga Valley National Park in the Brecksville area, about 15 miles south of downtown Cleveland, the FBI said. (AP Photo/FBI) Performers dance during a preview of American Broadway musical "A Chorus Line" at the Marina Bay Sands Theatre on Friday May 4, 2012 in Singapore. (AP Photo/Wong Maye-E) German Chancellor Angela Merkel reacts at the beginning of a board meeting of the German Christian Democratic party in Berlin, Germany, Monday, May 7, 2012. Voters in Germany's northernmost state on Sunday ousted a governing center-right government made up of the same parties as Chancellor Angela Merkel's federal coalition, according to official results. For Merkel, the defeat of her local allies in Schleswig-Holstein state could be an omen of worse to come. Elections are due in North-Rhine Westphalia state _ the country's most populous with 18 million inhabitants _ where her party also risks losing power, according to recent polls. (AP Photo/Michael Sohn) The British Royal Navy helicopter carrier HMS Ocean is reflected on the surface of a restaurant table as it moors in Greenwich, London, after sailing up the River Thames as part of a major security exercise in preparation for the Olympic Games, Friday, May 4, 2012. (AP Photo/Matt Dunham) France's President and conservative candidate for re-election in 2012, Nicolas Sarkozy, pauses as he delivers a speech during a campaign meeting in Sables d'Ollonne, western France, Friday, May 4, 2012. The final polls before France's presidential election Sunday show a shrinking gap between President Nicolas Sarkozy and Socialist challenger Francois Hollande, but still predict a Hollande victory. (AP Photo/Michel Euler) A girl gestures in front of the statue of Karl Marx, left, and Frederick Engels, right, the founders of communism, at a park in Shanghai, China, Friday, May 4, 2012. (AP Photo/Eugene Hoshiko) In this photo released by the US Embassy Beijing Press Office, U.S. ambassador to China, Gary Locke, left, makes a phone call as he accompanies blind lawyer Chen Guangcheng, right, in a car en route from the U.S. Embassy to a hospital in Beijing, Wednesday, May 2, 2012. At center is language attache James Brown. (AP Photo/U.S. Embassy Beijing Press Office, HO) Two unidentified men are surrounded by journalists after arriving in a U.S. embassy vehicle at an underground parking lot of a hospital where blind activist lawyer Chen Guangcheng is admitted in Beijing Friday, May 4, 2012. China hinted at a possible, face-saving way out of a diplomatic standoff with the United States over Chen, saying Friday that he could apply for permission to study abroad. (AP Photo/Ng Han Guan) Cannons fire a salute outside Moscow's Kremlin wall after an inauguration ceremony of president elect Vladimir Putin as Russia's new President on Monday, May 7, 2012. Vladimir Putin took the oath of office for a third term as Russia's president on Monday, saying he considers "service to the fatherland and our nation to be the meaning of my life." (AP Photo/Sergey Ponomarev) A Chinese woman protesting about her own grievances is taken away by plain clothes security personnel and uniformed police officers outside the hospital where blind activist lawyer Chen Guangcheng is recuperating in Beijing Friday, May 4, 2012. China said Friday that Chen can apply to study abroad in a possible step toward resolving a diplomatic standoff with the U.S. over the blind activist, who said he felt increasingly isolated and in danger at the hospital. (AP Photo/Ng Han Guan) Nepalese female devotees pull the chariot of Hindu deity Rato Machhendranath through a street in Lalitpur, Nepal, Friday, May 4, 2012. The chariot festival of Rato Machhendranath, regarded as the rain God, is one of the oldest and longest festivals celebrated in the Katmandu valley. (AP Photo/Niranjan Shrestha) Models present creations during Australian Fashion Week in Sydney, Australia, Friday, May 4, 2012. (AP Photo/Rob Griffith) Two images featuring blind Chinese activist Chen Guangcheng are seen during a protest in front of the Chinese central government's liaison in Hong Kong Friday, May 4, 2012. Chen is at the center of a diplomatic standoff between the United States and China said Friday his situation is "dangerous," and that American officials have been blocked from seeing him for two days and friends who have tried to visit have been beaten up. (AP Photo/Vincent Yu) A woman walks in front of a hair salon's giant billboard at a shopping mall in Bangkok Friday, May 4, 2012. (AP Photo/Sakchai Lalit) Vladimir Putin speaks with his hand on the Constitution during his inauguration ceremony as new Russia's president in Moscow on Monday, May 7, 2012. Putin has been sworn in as Russia's president for a third term after four years as prime minister. (AP Photo/RIA Novosti Kremlin, Vladimir Rodionov, Presidential Press Service) Royal Navy helicopters carrier HMS Ocean sails through the Thames Barrier on the River Thames in London to dock at Greenwich as part of London 2012 Olympic preparation security exercise, Friday, May 4, 2012. The HMS Ocean forms part of a co-ordinated defence against possible threats to the London 2012 Olympic games, involving all three British armed services. (AP Photo/Sang Tan) President Barack Obama and first lady Michelle Obama wave to the crowd during a campaign rally at Virginia Commonwealth University in Richmond, Va., Saturday, May 5, 2012. (AP Photo/Steve Helber) A Sri Lankan man makes decorative lanterns for buyers at a roadside shop on the eve of annual Buddhist festival "Vesakha" in Colombo, Sri Lanka, Friday, May 4, 2012. The festival which falls on May 5 this year, encompasses the birth, enlightenment and passing away of Gautama Buddha. (AP Photo/Gemunu Amarasinghe) People queue outside an unemployment registration office in Madrid Friday May 4, 2012. The number of people claiming unemployment benefits in Spain dropped slightly in April as employers hired for short-term jobs for the Easter vacation period. The overall jobless figure, which is released separately and quarterly, stands at 24.4 percent, or 5.6 million people. This is higher than the number receiving benefits because many Spaniards' benefits have run out. (AP Photo/Paul White)