We had made it through the border and were inside Aztlan. Now all we needed to do was make a ran south to the tiny town of Ciudad Acuna and cross the Rio Grande—the broad river that used to form a natural border between the former United States and Aztlan, or Mexico as it was then known. And from there we’d use our bogus resident alien IDs to make our way to the capital city of Tenochtitlán and . . .