The Tennessee Valley Authority based in Knoxville provided this undated photo of the Enterprise South economic development "megasite" at Chattanooga, Tenn. that Volkswagen picked Tuesday, July 15, 2008, for a  $1 billion, 2,000-employee auto assembly plant. This is the fourth TVA megasite sold for development in less than two years, with four sites remaining in Tennessee, Kentucky and Alabama. AP Photo logo AP Photo 46 months ago

The Tennessee Valley Authority based in Knoxville provided this undated photo of the Enterprise South economic development "megasite" at Chattanooga, Tenn. that Volkswagen picked Tuesday, July 15, 2008, for a $1 billion, 2,000-employee auto assembly plant. This is the fourth TVA megasite sold for development in less than two years, with four sites remaining in Tennessee, Kentucky and Alabama.