Concerns over America's fiscal outlook are mounting. Long-dated Treasury yields are at their highest levels since 2007, while the national debt has surpassed $40 trillion. Here are six financing challenges Washington tackled and how it overcame them ↧ The history of financing America, in six crisis episodes Concerns over America's fiscal outlook are mounting. Long-dated Treasury yields are at their highest levels since 2007, while the national debt has surpassed $40 trillion.