Vice President Joe Biden places his hand on the Biden Family Bible, held by his wife Jill Biden, as he takes the oath of office from Supreme Court Justice Sonia Sotomayor during the official swearing-in ceremony at the Naval Observatory, on January 20, 2013. (Photo by Carolyn Kaster/Associated Press)

This image provided by NASA shows the late-afternoon shadow cast by the Mars rover Opportunity at Endeavour Crater, January 20, 2013. The six-wheel rover landed on Mars in January 2004 and is still going strong. (Photo by NASA/AP)

Erin Leighton sips a coffee while seated next to a frost-covered window at a coffee shop in Portland, Maine, on January 24, 2013. (Photo by Robert F. Bukaty/Associated Press)

Indian paramilitary forces march during the annual Republic Day parade on Rajpath in New Delh, January 26, 2013. Republic Day commemorates the 1950 adoption of India's constitution. (Photo by Kevin Frayer/Associated Press)

Members of the Grande Rio Samba school rehearse at the “Cidade do Samba”, or Samba City, in Rio de Janeiro, January 24, 2013. (Photo by Felipe Dana/Associated Press)

An artist performs before Dutch fashion designer Iris van Herpen's Spring Summer 2013 Haute Couture fashion collection is presented in Paris, January 21, 2013. (Photo by Benjamin Girette/Associated Press)

Piornal, Spain: people throw turnips at the folkloric figure of El Jarramplas – a ritual believed to symbolise the expulsion of everything bad – as he makes his way through the streets beating his drum during the Jarramplas festival on January 22, 2013. (Photo by Pablo Blazquez Dominguez)

Firefighters work at the site where a helicopter crashed into a residential area of Sao Paulo, Brazil, January 21, 2013. According to authorities, the pilot flying the private helicopter died, and three passengers were injured. Sao Paulo has one of the world's largest private fleets of helicopters, used as a means of bypassing extremely congested roads. (Photo by Andre Penner/Associated Press)

In this photo made available today, Prince Harry races out from the VHR (very high ready-ness) tent to scramble his Apache with fellow pilots, during his 12 hour shift at the British controlled flight-line in Camp Bastion on November 3, 2012. The Ministry of Defense announced Monday that the 28-year-old prince is returning from his 20-week deployment. (Photo by John Stillwell/Associated Press)

A supporter of former Ukrainian Prime Minister Yulia Tymoshenko takes part in a rally outside Ukraine's Presidential office in Kiev, January 21, 2013. Ukrainian authorities have formally notified the ailed former Prime Minister that she is a suspect in the murder of a businessman and lawmaker in 1996. (Photo by Efrem Lukatsky/Associated Press)

Justin Bieber performs in Charlotte, N.C., January 22, 2013. (Photo by Jeff Siner/The Charlotte Observer)

Umbrellas displayed in front of Seoul City Hall are meant to symbolize public officials' intention to be an umbrella for the city's citizens, January 22, 2013. (Photo by Ahn Young-joon/Associated Press)

A photo painting by George Kalinsky of New York Rangers goalie Henrik Lundqvist is one of six iconic photos by Kalinsky, the longtime Madison Square Garden photographer, being auctioned to help fulfill the dreams of children facing obstacles, on January 22, 2013. Madison Square Garden Company says all net proceeds from the one-of-a-kind, signed artworks of sports and entertainment figures will benefit the Garden of Dreams Foundation. (Photo by George Kalinsky/Madison Square Garden Company)

Fashion designer Zahia appears at the end of her Women's Spring/Summer 2013 Haute Couture fashion collection presented in Paris, January 23, 2013. (Photo by Jacques Brinon/Associated Press)

U.S. Army Lt. Col. Tamatha Patterson looks on as Defense Secretary Leon Panetta and Chairman of the Joint Chiefs of Staff Gen. Martin Dempsey shake hands after signing a memo directing a policy change lifting a combat ban on women in the military, at the Pentagon in Arlington, on January 24, 2013. The decision overturns a 1994 Pentagon rule that restricted women from artillery, armor, infantry and other such combat roles. (Photo by Brendan Hoffman/The New York Times)

French military personnel and their vehicles are seen aboard a U.S. Air Force transport aircraft before departing for Mali from Istres airbase, near Marseille, France, January 24, 2013. (Photo by Claude Paris/Associated Press)

Satoria Ginn throws snow at Desiree Lyons along Laurel Street in Pocomoke City, Maryland, January 24, 2013. The snow was very dry, making snowballs hard to make, so they settled for throwing snow at each other. (Photo by Grant L. Gursky/The Daily Times)

Anti-abortion protesters dance as they wait on the sidewalk to march to the U.S. Supreme Court in a demonstration that coincides with the 40th anniversary of the Roe vs. Wade decision that legalized abortion, on January 25, 2013. (Photo by Manuel Balce Ceneta/Associated Press)

A protester evacuates an injured boy during clashes near Tahrir Square, January 25, 2013. Two years after Egypt's revolution began, the country's schism was on display Friday as the mainly liberal and secular opposition held rallies denouncing Islamist President Mohammed Morsi, saying the goals of the pro-democracy uprising have not been met. (Photo by Khalil Hamra/Associated Press)

An Orthodox priest blesses rifles during a ceremony where new recruits receive their weapons at a military base of the Belarussian Interior Ministry in Minsk January 23, 2013. The traditional ceremony was attended by 325 Belarussian recruits, and it is held a month after the recruits take their military oath. (Photo by Vasily Fedosenko/Reuters)

The suit worn by Britain's then-four year old Prince Charles on the day of his mother Queen Elizabeth's coronation is displayed in the throne room at Buckingham Palace during a media preview of this summer's exhibition, in central London, January 24, 2013. This summer's Buckingham Palace exhibition will commemorate the 60th anniverary of Queen Elizabeth's coronation with a collection of dresses, uniforms and robes worn on the day. (Photo by Andrew Winning/Reuters)

Japanese traditional wooden houses “Gassho zukuri”, are lit up in the snow-covered village of Shirakawa in Gifu prefecture, central Japan on January 19, 2013. The Gassho zukuri farmhouses were listed as one of the World Heritage by UNESCO in 1995, and the village will be illuminated until February 16. (Photo by JiJi Press/AFP Photo)

A French soldier wearing a skeleton mask stands next to a tank in a street in Niono, on January 20, 2013. French Defence Minister Jean-Yves Le Drian said today that the goal of France's military action in Mali was to retake control of the entire country from Islamist militants who have seized the north. “The goal is the total reconquest of Mali. We will not leave any pockets” of resistance, Le Drian said on French television. (Photo by Issouf Sanogo/AFP Photo)

A Kashmiri Muslim woman prays on a cold winter morning during the festival of Eid-e-Milad at Hazratbal shrine in Srinagar January 25, 2013. Thousands of Kashmiri Muslims on Friday thronged to the shrine of Hazratbal, which houses a relic believed to be a hair from the beard of Prophet Mohammad, to celebrate Eid-e-Milad or the Prophet's birth anniversary. (Photo by Danish Ismail/Reuters)

A person walks past a giant figure of famous Lucha Libre wrestler El Santo in Mazatlan January 24, 2013. The municipality set up eight giant figures made by Mexican artist Jorge Gonzalez Neri for the upcoming carnival celebrations. (Photo by Stringer/Reuters)

Ultra-Orthodox Jewish visitors look at a display of Nazi flags at Yad Vashem's Holocaust History Museum in Jerusalem January 25, 2013, ahead of International Holocaust Remembrance day which will be marked on January 27. (Photo by Amir Cohen/Reuters)

Authorities carry out the court-ordered punishment of the amputation of three fingers of a convicted thief, January 24, 2013. The 29-year-old man was convicted for being part of a 10-member gang that carried out burglaries in the city and for having “illegal relations”, according to the Mehr news agency. He was sentenced to the amputation, the confiscation of his property and three years in prison. (Photo by Mohsen Tavarro/Associated Press)

A model presents a creation by French designer Jean Paul Gaultier during the Haute Couture Spring-Summer 2013 collection shows on January 23, 2013 in Paris. (Photo by Pierre Verdy/AFP Photo)

Steam rises from a heating plant rises in the below freezing temperatures in Minsk, Belarus, on January 23, 2013. (Photo by Sergei Grits/Associated Press)

U.S. Secretary of State Hillary Clinton pounds her fists as she responds to intense questioning on the September attacks on U.S. diplomatic sites in Benghazi, Libya, during a Senate Foreign Relations Committee hearing on Capitol Hill in Washington, on January 23, 2013. (Photo by Kevin Lamarque/Reuters)

Relatives and friends of Lubna Hanash mourn during her funeral in Bethlehem. Israeli soldiers shot and killed Lubna near the West Bank town of Hebron, said Kamil Hmaid, the Palestinian governor of the Hebron district, January 23, 2013. The Israeli military said soldiers were attacked with firebombs and fired back. The 22-year-old woman was driving in a car when she was shot. (Photo by Bernat Armangue/Associated Press)

Steel workers in clash with riot police using pepper spray, during a protest outside the Prime Minister's office in Brussels, January 25, 2013. The world's leading steel and mining company ArcelorMittal announced that it will close a coke plant and six production lines in Belgium, in a move that threatens 1,300 jobs. (Photo by Yves Logghe/Associated Press)

Commuters ride on the roof of a train as they come back to the city after attending the final prayer of Biswa Ijtema in Dhaka January 20, 2013. Thousands of Muslims joined the Akheri Munajat, the final supplication as the second phase of the Muslims congregation concluded by seeking forgiveness and blessings for mankind on Sunday, local media reported. (Photo by Andrew Biraj/Reuters)

A truck is covered in ice as firefighters help to extinguish a massive blaze at a vacant warehouse on January 23, 2013 in Chicago, Illinois. More than 200 firefighters battled a five-alarm fire as temperatures were in the single digits. (Photo by Scott Olson)