The cardboard shell and mysterious meatlike substance are intended as a lighthearted tribute to Mexico and its vibrant cultural heritage
After flopping in a previous run for the border 15 years ago, Taco Bell tries again, opening an outlet in Mexico City. This time the company takes out half-page newspaper ads announcing, "It is a fast-food alternative that does not pretend to be Mexican food." 
Last updated January 16 2008: 5:51 PM ET
