At the peak of their powers, Ford, GM and Chrysler dominated the world's motor industry. Collectively known as the Big Three, their global reach and influence was enormous, responsible for millions of jobs in Michigan - the state of which Detroit is the largest city - and around the world. GM, founded in Detroit in 1908, rose to become the biggest of them all and still employs around a quarter of a million people globally. GM owns such diverse - and famous - motoring names as Cadillac, Chevrolet and Pontiac in the US, as well as Vauxhall in the UK, Opel in Germany and Saab in Sweden.