MT. HOLLY, NC – MARCH 7: U.S. President Barack Obama waves to the crowd after delivering remarks on the economy at the Daimler Trucks North America Mt. Holly Truck Manufacturing Plant on March 7, 2011 in Mt. Holly, North Carolina. President Obama outlined incentives to promote development of more fuel-efficient cars and to make it easier for people to buy and operate next-generation vehicles. (Photo by John W. Adkisson/Getty Images)