President Trump has signed an executive order paving the way for a Nippon Steel investment in U.S. Steel, so long as the Japanese company complies with a "national security agreement" submitted by the

Nippon Steel Corp. won conditional US approval for its $14.1 billion purchase of United States Steel Corp., capping a lengthy saga in a tie-up that will create one of the world’s largest steel companies.

President Donald Trump issued an executive order on Friday officially giving the green light to Nippon Steel Corporation's multi-billion-dollar purchase of U.S. Steel Corporation.