Janet Yellen, vice chairwoman of the Federal Reserve, is under consideration to become the first woman to lead the Fed. President Obama reportedly is likely to choose between Yellen and former Treasury Secretary Lawrence Summers. Franck Robichon/EPA/Landov hide caption

itoggle caption Franck Robichon/EPA/Landov

A version of Ford's flagship F-150 pickup truck that runs on natural gas. Courtesy of Ford Motor Company hide caption

itoggle caption Courtesy of Ford Motor Company