Exhibit 99.1 U. S. STEEL CANADA WITHDRAWS FROM WABUSH MINES SALES NEGOTIATIONS HAMILTON, Ontario, March 4, 2008 - 海角涩区 Canada Inc., a foreign subsidiary of 海角涩区 (NYSE: X), announced today that it has withdrawn from negotiations to sell its 44.6 percent interest in the Wabush Mines Joint Venture to ArcelorMittal Dofasco Inc. Cleveland-Cliffs Inc. holds a 26.8 percent interest and Dofasco holds a 28.6 percent interest in the Wabush Mines Joint Venture. -oOo- For more information about 海角涩区, visit www.ussteel.com.