WHAT:    GROUNDBREAKING ON CAPITAL INVESTMENT IN
             U. S. STEEL CLAIRTON PLANT

    WHERE:   U. S. STEEL CLAIRTON PLANT
             400 STATE STREET
             CLAIRTON, PA 15205

    WHEN:    WEDNESDAY, OCT. 22, 2008, 3 P.M.

PITTSBURGH - United States Steel Corporation (NYSE: X), will be hosting a groundbreaking ceremony for its capital investment program at the company's Clairton Plant. The groundbreaking is scheduled for Wednesday, Oct. 22, 2008 at 3 p.m. at U. S. Steel's Clairton Plant.

Among those scheduled to participate in the groundbreaking ceremony are Pa. Gov. Edward G. Rendell; Allegheny County Executive Dan Onorato; U.S. Rep. Mike Doyle; Pa. state Sen. Sean Logan; Pa. state Rep. David Levdansky; Domenic Virgona, mayor of Clairton; John Surma, chairman and chief executive officer of United States Steel Corporation; Lisa Roudabush, general manager of U. S. Steel Mon Valley Works; employees of U. S. Steel, and other state and local elected officials.



    For more information about U. S. Steel, visit www.ussteel.com.

    Contact:   Courtney Boone
               412.433.6791
               John Armstrong
               412.433.6792
               Erin DiPietro
               412.433.6845

SOURCE United States Steel Corporation