Mr Romney was animated, in command of his information, overriding the moderator and interrupting the president, says BBC North America editor Mark Mardell.
In the past these statements have rarely been challenged because the pension managers had greater command of the information and access to experts to enlist in their defense.
And this report says that the information, this information about Russia's role, came from captured Iraqi documents, and those documents, it says, claimed that the Russians had a source inside the U.S. military command who was funneling information to the Russian ambassador in Baghdad, who then gave it to the Iraqis.