"To begin with, I was hundreds of miles from Mexico City, the former Aztec capital. I was on the outer fringes of the territory that the Aztecs controlled." Avi scoops his GPS off the boulder and begins to punch keys on its pad, telling it to store the latitude and longitude in its memory. "I was looking," Avi continues, "for the site of a Nahuatl city that was raided by the Aztecs hundreds of years before the Spanish even showed up. You know what those fucking Aztecs did, Randy?"