Ключевые слова: barb, barbed, barbwire, barrier, blue, border, boundary, building, camp, closed, concrete, crime, criminal, danger, dangerous, day, defense, escape, fence, forbidden, freedom, guard, human, jail, metal, military, old, outside, prison, private, protection, razor, rights, safety, security, sharp, sign, silhouette, sky, spikes, spiral, state, steel, tower, wall, walls, war, wire, zone,