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 integratesa variety of radar, navigation, and communication systems for avionics, weapons control, and countermeasures on a range of platforms from helicopters to destroyers. Space systems produces satellites, sensors, space structures, and manufactures long-range missiles and rocket motors.