Japanese firm Nippon Steel has completed its long-sought takeover of a smaller American company, after agreeing to yield unusual control to the US government. The $14.9bn (£11bn) purchase of US Steel,

Nippon Steel's $14.9 billion acquisition of U.S. Steel closed on Wednesday, the companies said, confirming an unusual degree of power for President Donald Trump after the Japanese company's 18-month struggle to close the purchase.

Nippon Steel completes its purchase of U.S. Steel after more than a year and half of high-stakes negotiations and national security concerns.