Ключевые слова: abstract, background, barb, barbed, barbwire, barrier, black, blue, border, boundary, camp, closeup, cloud, concept, crime, danger, dangerous, detail, fence, forbidden, freedom, gate, guard, horizontal, iron, isolated, jail, metal, military, nature, old, outdoor, prison, private, protection, razor, red, safety, security, shape, sharp, silhouette, sky, steel, sunset, wall, war, warning, white, wire,