Julian Barnes writes in this morning's Los Angeles Times on the evolving issue of the use of private security contractors in Iraq and Afghanistan, turning to Dean Hutson for his expertise: 

America's Own Unlawful Combatants?

Using private guards in Iraq could expose the U.S. to accusations of treaty violations, some experts think.

by Julian E. Barnes, Los Angeles Times 

As the Bush administration deals with the fallout from the recent killings of civilians by private security firms in Iraq, some officials are asking whether the contractors could be considered unlawful combatants under international agreements.

The question is an outgrowth of federal reviews of the shootings, in part because the U.S. officials want to determine whether the administration could be accused of treaty violations that could fuel an international outcry.

But the issue also holds practical and political implications for the administration's war effort and the image of the U.S. abroad.

If U.S. officials conclude that the use of guards is a potential violation, they may have to limit guards' tasks in war zones, which could leave more work for the already overstretched military.

... 

John Hutson, a former top Navy lawyer, said he did not consider contractors to be unlawful combatants.

But that will be a difficult argument for U.S. officials to make, he emphasized.

"We are going to be hard-pressed to draw a distinction between the guys in Blackwater carrying automatic weapons and the bad guys setting bombs along the side of the road," said Hutson, now dean of Franklin Pierce Law Center in New Hampshire.

U.S. officials have described many of the suspected Al Qaeda and Taliban affiliates it holds at Guantanamo Bay as unlawful combatants either for taking part in hostilities against the United States or by supporting the hostilities while not part of a nation's military.

By that standard, some of the private guards in Iraq and Afghanistan also could be seen as unlawful combatants, particularly if they have taken offensive action against unarmed civilians, experts said.