Associated Press: Windmills off the East Coast could generate enough electricity to replace most, if not all, the coal-fired power plants in the United States, Interior Secretary Ken Salazar said Monday. But those numbers were challenged as “overly optimistic” by a coal industry group, which noted that half the nation’s electricity currently comes from coal-fired power plants. The secretary spoke at a public hearing in Atlantic City on how the nation’s offshore areas can be tapped to meet …