Biggest US motor show in years reveals renewed confidence in the industry – and an unprecedented focus on fuel economy The US auto industry’s biggest show has moved up a gear after pulling through the worst recession in living memory. The North American international auto show , which opened to the press on Monday in Detroit, looks set to be the biggest motor show in years. All the major manufacturers are back, with Nissan rejoining its rivals after a three-year absence as the industry courts an increasingly confident US consumer