"...Jihadi and Baath militants are.. regrouping as a smaller yet lethal insurgency..."

In the NYTimes, here

There is much debate as to whether any new insurgency, at a time of relative calm in most of Iraq, could ever produce the same levels of violence as existed at the height of the fighting here. A recent series of attacks, however, like bubbles that indicate fish beneath still water, suggest the potential danger, all the more perilous now because the American troops who helped to pacify Iraq are leaving...

To some experts, this amounts to ugly, but unavoidable, background noise, the deadly but no longer destabilizing face of violence in Iraq. In this view, there will be attacks, but no longer ones likely to topple Iraq’s government. Military officers, who spoke on the condition of anonymity because they were not authorized to talk to the news media, say they have reduced the number of jihadi militants to under 2,000, from about 3,800...

Other officials, Iraqi and American, are more worried. They observe jihadi and other insurgent groups activating networks of sleeper cells, which are already striking government and civilian targets. Insurgent groups linked to the rule of Mr. Hussein are also reviving.... American military officials believe they have checked the insurgency, but liken it to a spring. “It can come up quickly as soon as it is released, but the longer you keep it down the less it rebounds,”....