Defense Secretary Robert Gates talks with troops during a visit April 7 at Camp Victory in Baghdad. Chip Somodevilla/Getty Images hide caption

toggle caption Chip Somodevilla/Getty Images

A Tea Party supporter, left, argues with a critic before a rally where former Alaska Gov. Sarah Palin spoke at the Wisconsin State Capitol in Madison on April 16. Darren Hauck/Getty Images hide caption

toggle caption Darren Hauck/Getty Images

Exxon said its profits soared 69 percent during the first three months of 2011. Donna McWilliam/AP hide caption

toggle caption Donna McWilliam/AP

NPR thanks our sponsors

Become an NPR sponsor