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- US Steel is set to be sold for $14.9 billion to Japanese company Nippon Steel.
- US Steel was founded in 1901 and was once the world's most valuable company.
- The company has faced decades of decline, and fell out of the Dow Jones Industrial Average in 1991.
The U.S. Steel Corporation, once America's largest steelmaker and most valuable company, is set to be acquired by Japanese company Nippon Steel for $14.9 billion.