Washington Post: In one of the deepest, steepest corners of Appalachia, where the most important industry is shearing mountains down to flat-top stumps, everybody wants the same answer. What did Washington just do? About two weeks ago, the Environmental Protection Agency seemed poised to crack down on the “mountaintop” coal mines that are common in this region, which industry officials say would threaten thousands of jobs. The EPA said it had “significant concerns” about the mines — in which …