TV and radio host Glenn Beck targeted Frances Fox Piven as an "enemy of the Constitution." Death threats soon followed. Jose Luis Magana/AP hide caption

itoggle caption Jose Luis Magana/AP

A farmer harvests a corn crop near Monticello, Ill., last September. The price of wheat and corn jumped 70 percent in the second half of 2010. Seth Perlman/AP hide caption

itoggle caption Seth Perlman/AP

Demonstrators gathered outside the Ohio Statehouse last week to protest Senate Bill 5, which would have banned collective bargaining for state workers. Unions say legislation being pushed by Republican governors nationwide is an attack on their very existence. Jay LaPrete/AP hide caption

itoggle caption Jay LaPrete/AP

A production plant on the short of Mellitah, Libya, opened in 2004. Owned by Eni, the Italian oil and gas company, the facility is part of a pipeline that connects Libya to Sicily. Political unrest in the African nation is having effects in the worldwide oil market. Eni Press Office/AP hide caption

itoggle caption Eni Press Office/AP