A U.S. soldier, part of the NATO-led International Security Assistance Force, stands outside a military base in Panjwai, Kandahar province, south of Kabul, on Sunday. Allauddin Khan/AP hide caption

Yang Lan, TV host and delegate to the Chinese People's Political Consultative Conference, carries a Marc Jacobs handbag outside the Great Hall of the People in Beijing on March 3. Nicknamed "the Oprah Winfrey of China," Yang has also been seen wearing a Giorgio Armani jacket during the legislative session. Wang Zhou/Imaginechina/AP hide caption

Thousands of doses of cholera vaccine sit in a refrigerated trailer in a United Nations compound in Saint-Marc, Haiti. Vaccination was supposed to begin last week, but bureaucratic problems have delayed the start. April is the beginning of Haiti's rainy season, which will likely intensify Haiti's cholera outbreak. John Poole/NPR hide caption

Supporters and volunteers of the Alabama Republican Party gather outside before a forum at the Alabama Theater in Birmingham, Ala., on March 12. Marvin Gentry /Reuters /Landov hide caption

The superPAC Campaign for Primary Accountability is taking aim at Alabama Republican Rep. Spencer Bachus and other congressional incumbents. YouTube hide caption

An Illinois farmer checks the blades on his combine while harvesting corn last October. The value of the 2011 U.S. corn crop was more than $76 billion. Seth Perlman/AP hide caption