Exhibit 99.1 U.S. STEEL SETTLES ILLINOIS CASE PITTSBURGH, March 31 - United States Steel Corporation (NYSE: X) announced today that it has reached a settlement in a case in which a Madison County, Illinois, state court jury on March 28 returned a verdict against the company of $250 million, which included $50 million in compensatory damages and $200 million in punitive damages. The asbestos liability case involved a former employee at the company's Gary Works plant in Indiana. Terms of the settlement were not disclosed; however, the total amount of the settlement was substantially less than the compensatory damages award. -o0o-