Ключевые слова: air, air ambulance, airborne, aircraft, airport, ambulance, america, aviation, bay area, black, business, ca, california, care, chopper, company, contra costa county, critically, editorial use only, emergency, evacuation, fast, fire rescue, firefighters, flight, fly, health, healthcare, helicopter, help, ill, industry, injured, injury, medical, pilot, propeller, rescue, rotor, safety, san francisco bay, service, sky, transport, transportation, travel, united states, usa, vehicle, white,