The nation's carmakers may be nearing a finish line that no one wants to cross. Chrysler has until Thursday to submit a restructuring plan that will satisfy the federal government, which has loaned $4 billion to the auto manufacturer. Although America's smallest automaker won concessions from American and Canadian labor unions over the weekend, it still needs to reach an agreement with creditors. Will Italian carmaker Fiat step in to help save the day? Meanwhile, General Motors has announced it will close its classic Pontiac brand, as part of its third attempt at coming up with a restructuring plan that will please the feds. If the carmakers survive, what will a restructured industry look like? What will happen to the unions? How is Detroit's crisis affecting the rest of the state?