As the United States begins one final effort to secure victory through a "surge" of troops, FRONTLINE investigates how strategic and tactical mistakes brought Iraq to virtual civil war.

As the United States begins one final effort to secure victory through a "surge" of troops, FRONTLINE investigates how strategic and tactical mistakes brought Iraq to virtual civil war. The film recounts how the early mandate to create the conditions for a quick exit of the American military lead to chaos, failure and sectarian strife. In "Endgame,"producer Michael Kirk ("Rumsfeld's War,""The Torture Question,""The Dark Side"and "The Lost Year in Iraq") traces why the president decided to risk what military planners once warned could be the worst way to fight in Iraq - door-to-door - and assesses the likelihood of its success. Top administration figures, military commanders and journalists offer inside details about the new strategy.