USX CORPORATION v. LIBERTY MUTUAL INSURANCE COMPANY, Appellant USX Corporation, Appellant v. Liberty Mutual Insurance Company. No. 04-1277, 04-1300.United States Court of Appeals, Third Circuit.Argued March 7, 2006. Filed April 10, 2006. Appeal from the United States District Court for the Western District of Pennsylvania, Donald E. Zieger, Chief Judge, and Terrence F. McVerry, J. […]