TOP PICTURES OF 2012

Tightrope walker Nik Wallenda walks the high wire from the U.S. side to the Canadian side over the Horseshoe Falls in Niagara Falls, Ontario, June 15, 2012. REUTERS/Mark Blinch

Vacationers bask in front of the wreckage of capsized cruise liner Costa Concordia near the harbour of Giglio Porto June 20, 2012. The salvage operation to move the capsized Costa Concordia away from the island of Giglio, where it ran aground three months ago, will begin in June. REUTERS/Max Rossi

Commuters disembark from crowded suburban trains during the morning rush hour at Churchgate railway station on World Population Day in Mumbai July 11, 2012. According to a 2011 census conducted by the government of India, Mumbai has a population of more than 12 million with an estimated population density of about 20,482 persons per square kilometre. REUTERS/Vivek Prakash

A full moon as seen from West Orange, New Jersey, rises over the skyline of Lower Manhattan and One World Trade Center (L) in New York, May 6, 2012. REUTERS/Gary Hershorn

A double rainbow appears after a heavy monsoon storms over Nipton Road in Searchlight, Nevada, July 13, 2012. The National Weather Service has extended a flash flood watch through Saturday night, as rain and thunderstorms have rumbled into Southern Nevada. Picture taken July 13. 2012. REUTERS/Gene Blevins

Swirls of green and red appear in an aurora over Whitehorse, Yukon on the night of September 3, 2012 in this NASA handout image. The aurora was due to the interaction of a coronal mass ejection (CME) from the sun with Earth's magnetosphere. The CME left the Sun on August 31 and arrived on September 3. REUTERS/Courtesy of David Cartier, Sr./NASA/Handout

The Tribute in Light illuminates the sky over Lower Manhattan in remembrance of the 9/11 attacks on the 11-year anniversary as One World Trade is seen lit up in red, white and blue in New York September 11, 2012. REUTERS/Eric Thayer

The Space Shuttle Endeavour is escorted by two F18 jets as it passes the Hollywood sign on the back of a 747 on its arrival in Los Angeles September 21, 2012. The Endeavour will be put on display at its new permanent home the California Science Center in October. REUTERS/Mike Blake

An Occupy Wall Street demonstrator gestures at Goldman Sachs employees watching demonstrations below their building on the one-year anniversary of the movement in New York, September 17, 2012. REUTERS/Lucas Jackson

U.S. President Barack Obama celebrates on stage as confetti falls after his victory speech during his election rally in Chicago, November 6, 2012. REUTERS/Kevin Lamarque