Uncomfortable in their own system

Some good news about red on red fighting in Iraq.

Marines patrolling this desert region near the Syrian border have for months been seeing a strange new trend in the already complex Iraqi insurgency. Insurgents, they say, have been fighting each other in towns along the Euphrates from Husayba, on the border, to Qaim, farther west. The observations offer a new clue in the hidden world of the insurgency and suggest that there may have been, as American commanders suggest, a split between Islamic militants and local rebels.