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Historical Officers and Directors <br />for the period of 1/2/2003 to 212312009 <br />Rio Tinto America Inc. (7/28/1997 fka RTZ America Inc.) <br />A Delaware Corporation Incorporated 6/27/1973 <br />Address: 505 South Gillette Avenue. <br />Caller Box 3009 <br />Gillette, Wyoming 82717-3009 <br />AVS Entity ID No: 145522 <br />Director/Officer Name Title Role Appointed . End Date <br />Alan Davies Chief Legal Officer Officer 12/6/2004 3/12/2007 <br />Kevin L. Baker Assistant Secretary Officer 12/6/2004 4/23/2007 <br />Michael Barrett Vice President Officer 5/11/2005 4/23/2007 <br />Alan Davies Vice President and Chief Financial Officer 4/26/2004 4/23/2007 <br /> Officer <br />Michael Barrett Controller Officer 5/11/2005 7/2612007 <br />Ian C. Ratnage Treasurer Officer 10/2/1996 5/1/2008 <br />Ian C. Ratnage Vice President Officer 10/2/1996 5/1/2008 <br />Mike D. Edmonds Controller Officer 6/9/2003 2/5/2005 <br />Christopher Lenon President & Chief Executive Officer Officer 10/2/1996 12/8/2008 <br />Exhibit 2-22 Revision Date: 3/24/09 <br />Revision No.: MR-98