Northrop Grumman is a leading supplier of commercial aerostructures, producing fuselage sections, tail sections, doors, control surfaces, nacelles and thrust reversers for a variety of aircraft. The company is a world leader in airspace management systems and also provides systems integration and related information services, headquartered in West Falls Church, Virginia. Northrop Grumman has 90,000 employees with more than 550 facilities in all 50 US states and in more than 25 countries around the world. Northrop Grumman has four main business sectors: aeronautics systems, defence systems, mission systems and space systems.