Siemens has announced that it will lay off about 600 workers in Iowa and Kansas, representing 37% of its U.S. wind turbine manufacturing jobs. Although Siemens itself wasn't eligible for the wind Production Tax Credit (PTC), naturally the pending expiration spells a collapse in demand for their product. Supporters of wind power are outraged, but the episode actually underscores the danger in the government's assaults on the coal industry.