America’s Role in the Unfolding Chaos in Iraq

Two-and-a-half years after the U.S. pulled all its troops out of Iraq—a conflict that is projected to cost America more than $2 trillion dollars—Iraq is once again in crisis, with Islamic extremists gaining ground and a civil war brewing. Michael Kirk talks about the situation, and traces the role of the United States in the country since the 2003 invasion. His new Frontline documentary, "Losing Iraq,"  premieres July 29 at 10 pm on PBS.