Ключевые слова: abstract, antiterrorist, background, barb, barbed, barbed wire, barbwire, barrier, blue, border, boundary, closed, criminal, danger, dangerous, fence, forbidden, freedom, frontier, guard, immigration, iron, limit, metal, military, obstacle, outdoor, prevent, prison, private, prohibited, protection, protectionism, razor, razor wire, restricted, safety, security, sharp, silhouette, sky, spikes, spiral, steel, symbol, violence, wall, wire, wired,