Security guards stand as black smoke rises from tires, which were burned by protesters during an anti-US demonstration in Kabul, Afghanistan, Feb. 22, 2012. Anti-American demonstrations erupted on the outskirts of Kabul for a second day. (Ahmad Jamshid/AP Photo)

Firemen rescue wounded passengers from a commuter train after a collision in Buenos Aires, Argentina, Feb. 22, 2012. A packed train slammed into the end of the platform at Buenos Aires' Once station, killing dozens and injuring hundreds, according to police. (Leonardo Zavattaro/Telam/AP Photo)

Two young men pose for a photo "planking" on a beached fin whale in Ocean View in Norfolk, Va., Feb. 21, 2012. (Preston Gannaway/The Virginian-Pilot/AP Photo)

Switzerland's Michael Hoefer trains for the men's skeleton world championships in Lake Placid, N.Y., Feb. 22, 2012. (Mike Groll/AP Photo)

A vendor walks past Egyptian riot policemen standing guard outside a court in Cairo, Feb. 22, 2012, as the landmark murder and corruption trial of former President Hosni Mubarak entered its final day of hearings, with the judge expected to announce the date of the verdict. (Marco Longari/Getty Images)

Australian motocross rider and member of the Crusty Demons Robbie Marshall jumps over a helicopter with rotating blades and a Formula 1 car at Avalon Airport, Feb. 22, 2012, in Melbourne, Australia. (Scott Barbour/Getty Images)

A worker stands by as a young girl enjoys a swing ride at a carnival near the Shwedagon Pagoda during its 2600th anniversary celebration in Yangon, Myanmar, Feb. 22, 2012. (Altaf Qadri/ AP Photo)

Iranian workers put the final touches on a mural painting on a building west of the capital Tehran, Feb. 21, 2012 depicting late Major-General Hossein Kharazi who was killed during the 1980-88 Iran-Iraq war. Tehran's municipality has launched a project to paint more murals with the theme of the eight-year war on landmark buildings of the capital to keep the memory of the war alive. (Behrouz Mehri/AFP/Getty Images)