Russia's Advance Threatens to Cripple Ukraine's Steel Industry

In what promises to be a major milestone in more than two-and-a-half years of war, Russia is closing in on the capture of a vital industrial asset: a Ukrainian coal mine that's a cornerstone of the country's steel industry.  Owned by Ukrainian firm Metinvest, the modern facility -- opened in 1990 -- is Ukraine's largest mine for producing coking-coal, a specific grade used to fuel blast furnaces. It's near the village of Udachne, about 10 kilometers west of the city of Pokvrosk, which is itself a key supply hub in Ukraine's Donetsk oblast.…