The Echo Base in Diwaniya, southern Iraq is now under the full control of the Iraqi security forces.<br/> Almost all US forces are due to leave the country by the end of this year when a bilateral security pact expires.<br/> One US Colonel said there will be security challenges ahead.<br/> (SOUNDBITE) U.S. COLONEL SCOTT EFFLANDT, SAYING(English):<br/> "I think there will continue to be challenges with the security situation just like there are now. And I think with the support of the people and the government -- that the Iraqi army, Iraqi police will work through it and everything will be for the better."<br/> US officials had asked for 3000 troops to stay in Iraq but talks fell apart over the issue of immunity.<br/> A small contingent of under 200 troops will be attached to the US embassy.<br/> Marie-Claire Fennessy, Reuters
