IRAQ: AN INDEPENDENT ASSESSMENT HEARING before the COMMITTEE ON FOREIGN RELATIONS UNITED STATES SENATE ONE HUNDRED TENTH CONGRESS FIRST SESSION Tuesday, September 04, 2007 Time: 2:00 PM Place: 419 Dirksen Senate Office Building Presiding: Senator Kerry IRAQ: Congressional Committee Report     Witnesses:     The Honorable David M. Walker    Comptroller General of the United States    U.S. Government Accountability Office    Washington, DC   Witness names in blue are links to the statement given. Statements are only posted if provided electronically by witness.