Northrop Grumman is a diversified defense contractor providing aeronautics, defense, and space systems. The company's aerospace segment creates the fuselage for the massive F-35 program and produces autonomous and piloted aircraft such as Global Hawk drones and the new B-21 bomber. Defense systems makes artillery and missile ammunition and guidance systems, missile defense systems, and maintains and upgrades numerous military aircraft. Mission systems creates and integrates a variety of radar, navigation, and communication systems for avionics, weapons control, and countermeasures on a range of platforms from helicopters to destroyers. Finally, space systems produces satellites, sensors, space structures, and manufactures long-range missiles and rocket motors.