Is America Facing Economic Disaster? [23min]

Stephen Sackur talks to America's Auditor -in-Chief, David Walker. Does the future spell economic disaster for America? The richest, most powerful nation on earth faces a fiscal "tsunami" which threatens to overwhelm Government and citizens alike. Who says so? America's auditor in chief, David Walker, whose job it is to oversee all Federal spending. He's pleading with US politicians and taxpayers to face up to the harsh economic realities that come with an ageing population and spiralling budget deficits. But is economic disaster really so close at hand? Stephen Sackur talks to David Walker.