Sunset is seen through smoke from the Wallow fire June 8, 2011 in Springerville, Arizona. Hundreds of thousands of acres have burned in eastern Arizona prompting evacuations by residents. Smoke loomed over the twin towns of Eager and Springerville, home to about 7,000 people north of the fire. (Photo by Eric Thayer/Getty Images)

Senior hurricane forecaster Dr. Jack Beven studies computer models as he tracks Tropical Storm Arlene at the National Hurricane Center on June 29, 2011 in Miami, Florida. Arlene is the first named storm of the 2011 Atlantic hurricane season and is moving at 8 mph, packing sustained winds of 50 mph as it heads towards the east-central coast of Mexico. (Photo by Joe Raedle/Getty Images)

Participants gather in the Union Square subway station during the annual No Pants Subway Ride on January 8, 2012 in New York City. The annual event is staged by the group Improv Everywhere which encourages people in dozens of cities worldwide to discard their pants while riding the subway. (Photo by Mario Tama/Getty Images)

In this handout image provided by Carnival Australia, captain of the Queen Mary 2 Christopher Rynd poses on the desk of the Queen Mary 2 on February 8, 2012 in Perth, Australia. (Photo by James Morgan/Carnival Australia via Getty Images)

(L-R) Models Lindsay Ellingson, Adriana Lima, and Doutzen Kroes attend the Victoria's Secret Angels Valentine's Day Event at Victoria's Secret, SoHo on February 8, 2012 in New York City. (Photo by D. Dipasupil/Getty Images)

Visitors of the world's longest tree top walk between the trees of the Bavarian forest on November 6, 2009 in Neuschoenau, Germany. The path, 1300 meters long and in 8 to 25m height, winds up to an impressive tower with a height of 44 meters. The wooden construction is integrated into the forest and delivers a natural experience. (Photo by Miguel Villagran/Getty Images)

Girls pose during a photocall to promote the Big Royal Wedding Sleepover at “Camp Royale” on Clapham Common on March 8, 2011 in London, England. The “Pop Up” campsite will cater for up to 10,500 people between April 28 and May 1 to coincide with the weekend of the Royal Wedding on April 29. (Photo by Dan Kitwood/Getty Images). LONDON, ENGLAND – MARCH 08 2011

People walk past the 23-foot “Unitled (LAMP/BEAR)” outdoor sculpture of a teddy bear by artist Urs Fischer April 8, 2011 in New York City. The 35,000 pound sculpture of a yellow teddy bear with a working lamp will be on display for five months in front of the Seagram Building in Manhattan. The sculpture is expected to sell for more than $10 million at Christie’s Post-War & Contemporary Evening Sale on May 11. (Photo by Mario Tama/Getty Images)