FAIRLESS HILLS, PA – APRIL 6: President Barack Obama greets supporters after a town hall meeting April 6, 2011 at Gamesa Technology Corporation in Fairless Hills, Pennsylvania. Obama discussed building a 21st century clean energy economy to win the future. Gamesa’s Fairless Hills wind-energy turbine manufacturing facility employs approximately 300 workers and was built at a former U.S. Steel industrial site. (Photo by William Thomas Cain/Getty Images)