Scott Pruitt has repeated a particular line again and again since becoming the head of the Environmental Protection Agency.“The future ain’t what it used to be at the EPA,” he’s fond of saying.As it turns out, the past may not be what it once was, either.In an obscure corner of the Ronald Reagan International Trade Building, a debate is underway about how to tell the story of the EPA’s history and mission. Read more from Juliet Eilperin and Brady Dennis for the Washington Post.