The deal gives the White House extraordinary control over U.S. Steel as part of a pact to alleviate national security concerns.

Nippon agreed to give a "golden share" to the US government to win approval of the takeover.

The deal gives the White House extraordinary control over U.S. Steel as part of a pact to alleviate national security concerns.

The deal also allows US President Donald Trump to appoint a board member.

Japan-based Nippon Steel on Wednesday completed its buyout of U.S. Steel, changing its name to Nippon Steel North America, as the former U.S. industrial giant ended trading on…