Dick Polman, a political analyst for the Philadelphia Inquirer, evaluates the response of FEMA and other federal and local groups to Hurricane Katrina.
Robert Shaler, former director forensic biology at the New York City Office of the Chief Medical Examiner, led efforts to identify remains at the World Trade Center attacks. He discusses the challenges that lie ahead for those responsible for identifying the bodies of Hurricane Katrina's victims.
University of Chicago law professor Cass Sunstein discusses the death of Supreme Court Chief Justice William Rehnquist and President Bush's nomination of John G. Roberts to replace him.