Ключевые слова: action, air, air vehicle, aircraft, authority, automotive, aviation, blade, blue, british, chop, chopper, city, clear sky, cop, crew, crime, emergency, emergency services, enforcement, finding, flight, fly, force, healthcare and medicine, helicopter, helicopter rotors, hovering, mid air, mode of transport, moody sky, motion, officer, orange, piloting, police, protective, pursuit, remote, rescue, rotor, safety, searching, security, sky, sunset, taking off, transport, transportation, urgency,