And just who will do the weeding?

"Efforts are under way to weed out up to a quarter of Iraq's national police who are believed sympathetic to militias involved in sectarian violence, a key U.S. general said.
[snip]
Speeding up training of Iraqis security forces is one of the most talked-about options being considered as President Bush struggles to salvage the beleaguered Iraq campaign. And the future unreliability of Iraqi forces is a big question.

Dempsey said the instance of Iraqis who are actively involved with militias in the violence -- or who just look the other way and don't try to stop it -- is generally low among Iraq's security units, which include the armed forces, local police, national police and border agents.

The exception, he said, is the national police, which the Pentagon has described as a bridge force that was to handle law and order across provinces while officials worked to set up local community police forces.

"We believe that ... about 20 to 25 percent of them probably needed to be weeded out," Dempsey said of the national police in answer to a question."