Gentex Corp.'s rearview mirror camera display enables drivers to see objects and people behind the vehicle using a tiny camera mounted to the back of the car. Courtesy of Gentex Corp. hide caption

itoggle caption Courtesy of Gentex Corp.

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