Tucson is the second largest city in Arizona and has a population of 542,629 with over 1 million in the metropolitan area. UNESCO designated Tucson a “City of Gastronomy”, becoming the first city in the U.S. with this designation because of its rich agricultural heritage and thriving food traditions. Tucson has seen economic development in the past few years. The presence of the University of Arizona as well as the US Army Intelligence Center have led to the development of many high-tech industries including government contractors. Tucson is also a major hub for the Union Pacific Railroad’s Sunset Route that links Los Angeles with the Southern regions of the country.