“I ventured to believe that the function of the border wasn’t only to keep people out, at least that was not its long-term function. Its other purpose was to be visible, to be seen, to be carried in the imaginations of migrants deep into the interior of the country, in the interior of their minds. It was a spectacle meant to be witnessed by the world, and all of its death and violence was and continues to be a form of social control, the way that kings of the past needed to behead only one petty thief in the public square to quell thousands more.”