Ключевые слова: abstract, background, biohazard, border, concepts, country, damaged, danger, day, dirty, equipment, fence, flag, freedom, grunge, hazard, hazardous, history, ideas, inland, metal, nation, objects, old, outline, painted, patriot, patriotic, patriotism, pattern, plastic, protection, retro, rough, safety, security, sign, symbol, texture, textured, vintage, warning, weathered, white, wire, worn,