Although Dallas and Fort Worth are the ninth and 16th largest cities in the US respectively, the 12 county area that comprises the DFW Metroplex is the fourth largest metropolitan area in the United States (after Chicago, Los Angeles, and New York City) with a population of 6,426,214 according to the 2010 US Census.
All beer is created with yeast, but there are filtration processes that can remove yeast from the final product. All domestic beer in the United States such as Budweiser is yeast-free by law.
The most important ingredient in brewing was the last one discovered, because yeast is a single-celled organism that is invisible to the naked eye. Still, brewers have long known that some unseen agent turned a sweet liquid into beer. Modern brewers usually brew with purified strains of yeast that give exactly the result they want.