Ключевые слова: air, airline, art, background, blue, boarding, business, citizen, citizenship, color, colorful, concept, contour, cover, document, flat, flight, icon, id, identification, identity, illustration, international, isolated, journey, line, linear, lineart, national, object, outline, paper, pass, passenger, passport, security, sign, symbol, ticket, tourism, tourist, travel, trip, vacation, white, world,