The Chevrolet Camaro has been a classic "muscle car" for more than 40 years, but what does it take to build a classic car with 21st century technology? Now, after seven years off the factory line, Chevy is reintroducing the 2010 Camaro SS. National Geographic visits the 8.5-million-square-foot factory—one of the largest auto plants in the world—where the car is stamped from cold raw steel and assembled by high-tech, precise robots and nearly 5,800 employees, to create the car's specially-designed "unibody" construction.