From Wikipedia

I.O.U.S.A.

I.O.U.S.A. is a 2008 documentary film directed by Patrick Creadon. The film focuses on the shape and impact of the United States national debt. The film features Robert Bixby, director of the Concord Coalition, and David Walker, the former U.S. Comptroller-General, as they travel around the United States on a tour to let communities know of the potential dangers of the national debt. This is a tour carried out through the Concord Coalition, and is known as the "Fiscal Wake-Up Tour." In February 2008, Walker announced that he would be resigning from his post as Comptroller General to become the president and CEO of the newly established Peter G. Peterson Foundation. His term is scheduled to end in 2013. He states that he feels he can more freely draw attention to the serious issues the U.S. is facing from this position.

The film competed in the Documentary Competition at the 2008 Sundance Film Festival. It began its nationwide showing at the Holland Performing Arts Center in Omaha, Nebraska on 21 August 2008, with a live discussion among Warren Buffett, Pete Peterson, David Walker, William Niskanen, and Bill Novelli following the screening. The film was broadcast on CNN on January 10, 2009.