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United States Steel Corporation is an integrated steel producer. The Company is engaged in producing flat-rolled and tubular products with production operations in North America and Europe. The Company operates through three segments: Flat-Rolled Products (Flat-Rolled), U. S. Steel Europe (USSE) and Tubular Products (Tubular). The Flat-Rolled segment includes the operating results of its integrated steel plants and equity investees in the United States involved in the production of slabs, rounds, strip mill plates, sheets and tin mill products, as well as all iron ore and coke production facilities in the United States. The USSE segment includes the operating results of U. S. Steel Kosice (USSK) and its integrated steel plant and coke production facilities in Slovakia. The Tubular segment includes the operating results of its tubular production facilities, primarily in the United States and equity investees in the United States and Brazil.