National Cheese Pizza Day

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Jennifer Silverberg
The Margarita pizza, with cheese and oregano, from Mr. X Pizza in South St. Louis, Missouri. Read more: Pizza My Heart: Mr. X will ignite your lust for crust.
September 5 was dubbed by the Internet as "National Cheese Pizza Day," but much like Earth Day, every day in America is Cheese Pizza Day. In that spirit, here are slices from coast to coast, from foldable plain slices to coma-inducing gut bombs. (Some pies feature a little extra toppings over that bed of cheese.)