The Boeing Co. is an aerospace company, which engages in the manufacture of commercial jetliners and defense, space, and security systems. It operates through the following segments: Commercial Airplanes, Defense, Space and Security, Global Services, and Boeing Capital. The Commercial Airplanes segment includes the development, production, and market of commercial jet aircraft and provides fleet support services, principally to the commercial airline industry worldwide. The Defense, Space and Security segment refers to the research, development, production and modification of manned and unmanned military aircraft and weapons systems for global strike, including fighter and combat rotorcraft aircraft and missile systems, global mobility, including tanker, rotorcraft and tilt-rotor aircraft, and airborne surveillance and reconnaissance, including command and control, battle management and airborne anti-submarine aircraft. The Global Services segment provides services to commercial and defense customers. The Boeing Capital segment seeks to ensure that Boeing customers have the financing they need to buy and take delivery of their Boeing product and manages overall financing exposure.