The Bethlehem Steel Corporation (1857 2003), based in Bethlehem, Pennsylvania, was once the second-largest steel producer in the United States, after Pittsburgh, Pennsylvania-based U.S. Steel. After a decline in the U.S. steel industry and management problems leading to the company's 2001 bankruptcy, the company was dissolved and the remaining assets sold to International Steel Group in 2003. In 2005, ISG merged with Mittal Steel, ending U.S. ownership of the assets of Bethlehem Steel.