U.S President Barack Obama (L) takes the oath of office from U.S. Supreme Court Chief Justice John Roberts (R) as first lady Michelle Obama holds the bible and daughters Malia (3rd-L) and Sasha look on in the Blue Room of the White House in Washington, January 20, 2013.

Tottenham Hotspur's Benoit Assou-Ekotto reacts after teammate Clint Dempsey scored against Manchester United during their Premier League soccer match at White Hart Lane in London January 20, 2013.

Pandu and Dian, tourists from Indonesia, jump for a souvenir photograph taken by their friend in front of the Houses of Parliament, during a snowfall in central London January 20, 2013.

Novak Djokovic of Serbia celebrates defeating Stanislas Wawrinka of Switzerland in their men's singles match at the Australian Open tennis tournament in Melbourne January 21, 2013. Djokovic survived an early onslaught and a late fightback from Wawrinka in a pulsating fourth-round clash to advance to the quarter-finals of the Australian Open early on Monday.

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.

People cool off in front of the spray from misting fans during the Australian Open tennis tournament in Melbourne, January 20, 2013.