 GEOG: When Barris and Byrd are in Mexico City (according to a  caption), we can see a Saguaro cactus in the background. This type  of cactus can only be found in the Sonoran desert in the USA, and  cannot survive over 3,000 ft. Mexico City is about 1000 miles away  from the Sonoran desert and is at 7,500 ft.