TOKYO: US authorities have extended the deadline for Japan's Nippon Steel to abandon its acquisition of its American rival after President Joe Biden blocked the deal , the companies said on Sunday (Jan 12). Biden cited national security concerns as he put a stop to the US$14.9 billion sale of US Steel to the Japanese giant. Accusing the president of "illegal interference", the companies filed a legal review with the US court of appeals. The administration will now hold off enforcing the order