Protestors build border wall to act out potential Brexit unrest Protestors shut down a border road between Ireland and Northern Ireland, erecting a concrete wall with mock-military checkpoints to illustrate the violent unrest a hard Brexit could bring to the fragile region. Locals hauled towering concrete barriers into place and installed a customs hut defended by a watchtower manned by men dressed as armed British troops -- evoking haunting memories of the three decades of bloodshed known as "the Troubles". IMAGES of the street action and SOUNDBITES from participants