WASHINGTON - SEPTEMBER 10:  Christopher Hill, U.S. Ambassador to Iraq testifies during a House Foreign Affairs Committee hearing on Capitol Hill September 10, 2009 in Washington, DC. The committee is hearing testimony on U.S. policy regarding Iraq. Getty Images logo Getty Images 29 months ago

WASHINGTON - SEPTEMBER 10: Christopher Hill, U.S. Ambassador to Iraq testifies during a House Foreign Affairs Committee hearing on Capitol Hill September 10, 2009 in Washington, DC. The committee is hearing testimony on U.S. policy regarding Iraq.