As the threat of full-scale sectarian strife looms, the American military is scrambling to try to weed out ethnic or religious partisans from the Iraqi security forces. The United States faces the possibility that it has been arming one side in a prospective civil war. Early on, Americans ceded operational control of the police to the Iraqi government. Now, the police forces are overseen at the highest levels by religious Shiite parties with militias, and reports of uniformed death squads have risen sharply in the past year. Full Story