Ключевые слова: 21, 21st, background, bird, card, cause, celebration, charity, day, dove, event, faith, flying, freedom, gesture, grace, happy, holiday, hope, humanitarian, humanity, international, issue, leaf, love, map, media, message, nature, olive, peace, peaceful, pigeon, post, poster, purity, september, social, symbol, unity, white, wing, wishes, world,