WASHINGTON : U.S. Treasury Secretary Janet Yellen said on Wednesday that Nippon Steel's blocked acquisition of U.S. Steel received a "thorough analysis" by an interagency national security review body that was sent to President Joe Biden. Yellen, in a live interview on CNBC, said she could not discuss specifics of the review of the merger blocked by Biden last week that is now the subject of a lawsuit that alleges that the review by the Committee on Foreign Investment in the United States (