Scientists report they have made a living cell from DNA that was originally synthesized in a lab. iStockphoto.com hide caption

Ahmed Wali Karzai (center, on phone), pictured here last November when his brother Hamid was re-elected president of Afghanistan, is a powerful leader in Kandahar. Chairman of Kandahar's provincial council, he is allied with the U.S. but tainted by accusations of corruption. Banaras Khan/AFP/Getty Images hide caption

Workers construct a dam to keep oil from entering wetlands on Elmer's Island in Louisiana. Patrick Semansky/AP hide caption

Louisiana National Guard members retrieve a sling-load cable as helicopters drop sandbags into place in an estuary. Joe Raedle/Getty Images hide caption

Maria Villareal (right), owner of Tamaleria Nuevo Leon, and helper Margarita Gamino make tamales in Villareal's store in the Mexican Town district in Detroit two years ago. Detroit's Mexican community has seen a 34 percent increase in small business development in just the past three years. Carlos Osorio/AP hide caption