West Mifflin Mayor Chris Kelly and North Braddock Mayor Cletus Lee are confident that the Mon Valley region will take a leap forward, resulting from Nippon Steel's investment in U.S. Steel.

U.S. Steel made clear it would become a "wholly owned subsidiary" of Nippon North America under the terms of the merger agreement in an April 8 filing with the Securities and Exchange Commission.

U.S. Steel made clear it would become a "wholly owned subsidiary" of Nippon North America under the terms of the merger agreement in an April 8 filing with the Securities and Exchange Commission.

Nippon Steel aims to keep its debt-to-equity ratio at 0.7 or below -- possibly a tall order after it acquires U.S. Steel. (Photo by Sae Kamae) ...

U.S. Steel shares are trading higher Monday after President Trump approved the takeover by Nippon Steel. The agreement includes provisions such as a “golden share” for the U.S. government ...

President Donald Trump issued an executive order on Friday approving U.S. Steel’s merger with Japan’s Nippon Steel, after the companies signed a national security agreement with the U.S ...