Ключевые слова: activist, announce, antenna, art, banner, blue, bomb, bullhorn, communication, contour, crowd, demonstration, freedom, glowing, icon, illustration, isolated, light, line, linear, lineart, loud, loudspeaker, message, military, mobile, neon, outline, people, placard, political, portable, protester, red, revolution, sign, speaker, speech, strike, symbol, talkie, technology, transceiver, transmitter, walkie, war, wireless,