ACCIAI SPECIALI TERNI S.P.A. (now known as ThyssenKrupp Speciali Terni S.p.A.) and Acciai Speciali Terni USA (now known as ThyssenKrupp AST USA, Inc.), Plaintiffs-Appellants, v. UNITED STATES, Defendant-Appellee, and Allegheny Ludlum Corp., AK Steel Corporation, Butler Armco Independent Organization, United Steelworkers of America, AFL-CIO/CLC, and Zanesville Armco Independent Organization, Defendants-Appellees