I believe many mirian involved directly in oil and gas and you might heard some of the news mentioned in the documentary, for example when boots and coots acquired by halliburton.
the names halliburton, transocean, boots n coots, nalco can be considered as the biggest players in their respective field / specialty.
what do you think? i believe there must be more stories either against or support the theory that you have heard before. would like to know your comment.