Pizza was brought to the United States with Italian immigrants in the late nineteenth century, and first appeared in areas where Italian immigrants concentrated. The country's first pizzeria, Lombardi's, opened in 1905. Following World War II, veterans returning from the Italian Campaign after being introduced to Italy's native cuisine proved a ready market for pizza in particular. Since then pizza consumption has exploded in the U.S. Pizza chains such as Domino's, Pizza Hut, and Papa John's, pizzas from take and bake pizzerias, and chilled or frozen pizzas from supermarkets make pizza readily available nationwide. It is so ubiquitous, thirteen percent of the U.S. population consumes pizza on any given day.
