captioning made possible by friends of nci] >> previously on "globe trekker around the world," justine shapiro traveled across america on route 66 and beyond, from virginia to arizona. now we join judith jones as she crosses the border into mexico, and we continue our journey south into latin america, the land of conquistadors, aztecs, and incas. >> human sacrifice, religion, greed, war, and torture have all played their part in the building and crushing of magnificent empires. >> bandits! >> a continent that is now a living, breathing mix of cultures thousands of years old. [crash] our journey through latin america will take us to pre-hispanic civilizations all but destroyed by conquistadors, to sites which witnessed the violent struggles for independence from spain and then revolution and bloody civil war. welcome to latin america, land of the legendary conquistadors, aztecs, and incas... and of course, tequila! i begin this journey at the epicenter of this struggle, in mexico, located between the united states to the north and latin america to the south. from chihuahua in the northeast, i d