The fatal explosion last week at U.S. Steel’s Pittsburgh-area coal-processing plant has revived debate about its future just as the iconic American company was emerging from a long period of uncertainty. The fortunes of steelmaking in the U.S. — along with profits, share prices and steel prices — have been buoyed by years of friendly administrations in Washington that slapped tariffs on foreign imports and bolstered the industry’s anti-competitive trade cases against China. Most recently, President Donald Trump’s administration postponed new hazardous air pollution requirements for the nation’s roughly dozen coke ... (full story)