Shakira, center, Colombian born Grammy-winning singer and songwriter, sings one of her songs with members of the Harvard Ballroom Dance Team after the team's performance at Harvard University in Cambridge, Mass., Saturday, Feb. 26, 2011, where Shakira was named the Harvard Foundation Artist of the Year. (AP Photo/Josh Reynolds)
Rescue workers work to extinguish a fire at a collapsed building of King's Education in central Christchurch, New Zealand, Tuesday, Feb. 22, 2011. A powerful earthquake collapsed buildings at the height of a busy workday killing and trapping dozens of people in one of the country's worst natural disasters. In the collapsed King's Education building, several among a group of 23 Japanese exchange students and teachers were still unaccounted for. (AP Photo/New Zealand Herald, Mark Mitchell)
Rescue workers and a helicopter work to extinguish a fire at a collapsed building of King's Education in central Christchurch, New Zealand, Tuesday, Feb. 22, 2011. A powerful earthquake collapsed buildings at the height of a busy workday killing at least 65 people and trapping dozens in one of the country's worst natural disasters. Several among a group of 23 Japanese exchange students and teachers at King's Education were still unaccounted for. (AP Photo/New Zealand Herald, Mark Mitchell)
Yemeni policemen push back government supporters raising posters showing President Ali Abdullah Saleh as they shout at anti-government demonstrators (not pictured) in Sanaa, Yemen, on Sunday, Feb. 20, 2011. Some 3,000 students protesting at Sanaa University in the Yemeni capital sought to oust longtime President Ali Abdullah Saleh, a key U.S. ally in the fight against al Qaeda, and have been inspired by uprisings in Egypt and Tunisia. (AP Photo/Muhammed Muheisen)
Thomas H. Kunz, of Boston University takes part in a panel discussion on the use of radar to study bats, Friday, Feb. 18, 2011, during the the annual convention of the American Association for the Advancement of Science, in Washington. (AP Photo/Jacquelyn Martin)
Students from McFarland High School in McFarland, Wis., join opponents of Wisconsin Gov. Scott Walker's budget repair bill during evening demonstrations at the state Capitol in Madison, Wis., on Wednesday, Feb. 16, 2011. (AP Photo/Wisconsin State Journal, John Hart)
Pennsylvania's Central Bucks East High School teacher Natalie Munroe, suspended for profanity-laced posts on her blog, says she was emphatically stating the truth about rude students not willing to work hard in school. (Associated Press)
Central Bucks, Pa., East High School teacher Natalie Munroe is seen during a phone interview at her attorneys office in Feasterville, Pa., Tuesday, Feb. 15, 2011. Munroe, suspended from her job over profanity-laced posts on her blog, says she was speaking the truth about students who are unwilling to work hard at school. (AP Photo/Matt Rourke)
Actor Jack Black, center front, poses for pictures with students from Parkside Elementary and Kipp Elementary schools in Atlanta, during a naming ceremony for a 3-month-old giant panda cub born at the Atlanta Zoo Tuesday, Feb. 15, 2011 in Atlanta. Black who is promoting his animated film, "Kung Fu Panda II", posed for pictures with the cub, who is the only giant panda born at a U.S. zoo last year. (AP Photo/David Goldman)
