Alejandro: Nothing will make sense to your American ears, and you will doubt everything that we do, but in the end you will understand.
Question: A major scene and gunfight take place right after the convoy crosses the border and is forced to stop in traffic. The members of the convoy scan the surrounding vehicles and find two filled with men carrying weapons in full view, not to mention the occupants looking like stereotypical gang members. How did those two cars cross the border in order to be in the same slow traffic - surely border control would have stepped in? How did they come to be there for the attempted ambush?