James Grace, 6, looks at a butterfly during the Changing Minds Foundation's "Butterfly Flutter By" event April 22, 2012, in Houston. The foundation released 1,000 live butterflies to raise awareness of available treatment and research of Down syndrome. Each butterfly could be sponsored for $21, a representative of Trisomy 21, a chromosomal condition that causes Down syndrome. (Cody Duty/Houston Chronicle/AP Photo)

French Socialist Party presidential candidate Francois Hollande, extends his arm to shake hands as he tours the town center of Quimper, France, while campaigning, April 23, 2012. Hollande, who garnered 28.5 percent of votes in the first round of elections, will face incumbent President Nicolas Sarkozy, who gained 27 per cent, in the next round. (Ian Langsdon/EPA)

A man is seen through the wreckage of a Bhoja Air Boeing 737 passenger plane that crashed on April 20, 2012, killing all 127 people on board, in the outskirts of Islamabad, Pakistan, April 23, 2012. The Pakistani government mandated Sunday that all airplanes operated by private airlines must undergo a new inspection to determine whether they are safe to fly, days after the crash. (Muhammed Muheisen/AP Photo)

Grief-stricken owners arrive at the scene of a horse barn fire in Billing, Mont., April 23, 2011. Fire officials say 20 horses died when a fire destroyed a large horse barn at High Plains Stables on the west end of Billings. (Larry Mayer/The Gazette/AP Photo)

Well-dressed demonstrators, organized by the satirical gentleman's publication Chap Magazine, protest outside the proposed site of a new Abercrombie & Fitch children's clothing store on Savile Row, April 23, 2012, in London. The protestors claim that the chain store's presence would signal the demise of a street dedicated to the custom tailoring trade. (Matthew Lloyd/Getty Images)

American Airlines and American Eagle employees prepare to march to U.S. Bankruptcy Court to protest against American's plans to cut jobs and labor costs while under bankruptcy court protection, April 23, 2012, in New York. American is seeking permission to break-up union contracts and cut expenses by $1.25 billion. (Spencer Platt/Getty Images)

Birds perch on a branch during a spring snowstorm in Pembroke, N.Y., April 23, 2012. (David Duprey/AP Photo)

An Audi TTS is displayed at the 2012 Beijing International Automotive Exhibition at China International Exhibition Center, April 22, 2012, in Beijing. The exhibition opens to the general public on April 25 and runs until May 2, 2012. (ChinaFotoPress via Getty Images)

A Bangladesh Nationalist Party activist is reflected on the helmet of a police officer as she shouts slogans during a nationwide general strike in Dhaka, Bangladesh, April 23, 2012. Police opened fire into hundreds of stone-throwing opposition supporters who attacked a police station on Monday, the second day of an opposition-sponsored general strike to protest a politician's disappearance. (Pavel Rahman/AP Photo)