Cars sit in the northbound lanes of Lake Shore Drive after accidents and drifting snow stranded the drivers during last night's blizzard Feb. 2, 2011 in Chicago, Illinois. As of late morning over 20 inches of snow had fallen, making this snowstorm the third largest recorded in the city.  (Photo by Scott Olson/Getty Images)

Sigo Hatareyama works to clean out what is left of his house, March 21, 2011 in Kesennuma, Japan. The 9.0 magnitude strong earthquake struck offshore on March 11 at 2:46pm local time, triggering a tsunami wave of up to ten metres which engulfed large parts of north-eastern Japan, and also damaging the Fukushima nuclear plant and threatening a nuclear catastrophe. The death toll continues to rise with numbers of dead and missing exceeding 20,000 in a tragedy not seen since World War II in Japan.  (Photo by Chris McGrath/Getty Images)

Brush and trees are engulfed in flames after firefighters set a backburn along Highway 191 in an attempt to control a raging wildfire,  June 10, 2011 in Nutrioso, Arizona. The fire, which is five percent contained, has so far consumed over 400,000 acres of land and destroyed 29 homes.  (Photo by Kevork Djansezian/Getty Images)

Maddie Meek,9, and her mother Dina Meek salvage what they can from her sister-in-law's home after it was destroyed when massive tornado passed through the town killing at least 116 people, May 24, 2011 in Joplin, Missouri. Authorities were prepared to find more bodies in the town of 50,000 people.  (Photo by Joe Raedle/Getty Images)

A cloud of smoke and ash is seen over the Grimsvoetn volcano on Iceland,  May 21, 2011. The cloud rising up from Grimsvoetn as a result of the eruption was seen first time around 1900 GMT and in less than an hour it had reached an altitude of 11 kilometres (6.8 miles),' according to the Icellandic meterological institute. (STR/AFP/Getty Images)

Cattle rest at a watering hole in a pasture July 28, 2011 near Canadian, Texas. A severe drought has caused shortages of grass, hay and water, in much of the state, forcing ranchers to thin their herds or risk losing their cattle to the drought. The past nine months have been the driest in Texas since record keeping began in 1895, with 75% of the state classified as exceptional drought, the worst level.  (Photo by Scott Olson/Getty Images)

Floodwater surrounds a home in the King's Community neighborhood May 17, 2011 in Vicksburg, Mississippi. The Mississippi river at Vicksburg is expected to crest May 19. Heavy rains have left the ground saturated, rivers swollen, and have caused widespread flooding along the Mississippi River from Illinois to Louisiana.  (Photo by Scott Olson/Getty Images)

Billy Stinson (L) comforts his daughter Erin Stinson as they sit on the steps where their cottage once stood before it was destroyed by Hurricane Irene Aug. 28, 2011 in Nags Head, North Carolina. The cottage, built in 1903, was one of the first vacation cottages built on Roanoke Soundin Nags Head. Stinson has owned the home, which is listed in the National Register of Historic Places, since 1963. "We were pretending, just for a moment, that the cottage was still behind us and we were just sitting there watching the sunset," said Erin afterward.   (Photo by Scott Olson/Getty Images)

Rescuers carry two-week-old baby girl Azra Karaduman from the rubble of a collapsed building in Ercis, Turkey's eastern province of Van, Oct. 25, 2011. Crowds cheered and applauded as 73-year-old Gulzade Karaduman was carried into an ambulance, hours after her tiny granddaughter Azra and then her daughter Seniha Karaduman were pulled free from the wreckage of the family home in the eastern town of Ercis. As the death toll reached 459 and the Red Crescent warned that hundreds or even thousands of people remained buried under the debris from Sunday's quake, the triple rescue provided vital relief amid the otherwise grim task.  (Adem  Altan/AFP/Getty Images)

A Thai man takes pictures with his son on a custom-built tricycle designed to go through floodwaters in Bangkok, Thailand, Oct. 28, 2011. The Chao Phraya river coursing through the capital swelled to record highs Friday, briefly flooding riverside buildings and an ornate royal complex at high tide amid fears that flood defenses could break and swamp the heart of the city. (Aaron Favila/AP Photo)