U.S. air industry has lost more than $ 30 billion over the past four years, including an estimated 8.5 billion dollars in 2008; industry was expected to lose at least $ 2 billion in 2009 year. The continuing influx of red ink from the balance of the industry, as well as the decision of the United Airlines to give $ 9.8 billion in pension obligations to the federal taxpayers' lap, leaves no doubt that the airline industry remains one of the most volatile sectors in the American economy.