WASHINGTON U.S. President Joe Biden has decided to block the proposed $14.9 billion purchase of U.S. Steel by Japan's Nippon Steel and will announce the move as soon as Friday, according to U.S. media. A White House announcement of the presidential finding is being planned unless Biden has a last-minute change of heart, according to the Washington Post and the New York Times. Biden decided to block the deal despite intense efforts to sway him in recent days by some of his senior advisors, who