Exhibit 3

AGREEMENT OF JOINT FILING

Pursuant to Rule 13d-1(k)(1) of the Securities and Exchange Commission under the Securities and Exchange Act of 1934, as amended, each of the undersigned agrees that the statement on Schedule 13D filed herewith shall be filed on behalf of each of the undersigned.

Dated: March 19, 2010

CHINA INVESTMENT CORPORATION

By:        /s/  Lou Jiwei              

Name:  Lou Jiwei

Title:  Chairman and CEO

TERRIFIC INVESTMENT CORPORATION

By:        /s/ Gao Xiqing           

Name:  Gao Xiqing

Title:  Legal Representative