When you hear the words “U. S. Steel,” you might picture men and women in facemasks and fireproof gear working on fiery blast furnaces and red hot rolling mills. While that may be the typical image of loud and smoky steel production in America, there’s also an entire field of clean innovation happening behind the scenes, largely being done by people you’d never expect.  U. S. Steel is an employer partner of Bidwell Training Center, whose chemical lab technician program provides no-cost training to adults looking to change careers and enter the fields of product testing and R&D. In recent years, BTC graduates have become an integral part of U.…