No American serviceman has been executed since 1961. But in the past month, new cases in Iraq have led to charges against 12 American servicemen who may face the death penalty in connection with the killing of Iraqi civilians. Military officials caution against seeing the cases as part of any broader pattern, noting that the incidents in question are isolated and rare. But the new charges represent an extraordinary flurry in a conflict that has had relatively few serious criminal cases so far. Full Story