Manufacturing output showed brisk growth in the first quarter of 2011, growing at four times the estimated rate for the overall U.S. economy. The PNC Financial Group estimates growth for the first quarter for the overall economy at 2%. This growth is supported by exports to developing countries in Asia and Latin America with the help of a weaker dollar. American companies are also increasing investment in computers, machinery and other equipment. This has increased growth and profits for companies such as Intel, Caterpillar, Eaton, and United Technologies. Manufacturing in the U.S. is rebounding from the sharp drop in 2008-2009. During the first quarter it increased at an annual rate of 9.1% according to the Federal Reserve. In the second half of 2011 manufacturing is expected to slow to about 4%, according to Manufacturer's Alliance/MAPI. So far manufacturing has shrugged off concerns about oil prices approaching $110 a barrel and the earthquake in Japan. This growth has pushed the Dow Jones Industrial Averages to 12453, the highest close since June 2008....