is a leading U.S. defense company operating four main business segments. Aerospace designs, develops, manufacturers and services a comprehensive offering of advanced business-jet aircraft. Combat Systems is a global leader in producing, supporting and sustaining land and expeditionary combat systems for the U.S. military and its allies. Marine Systems designs, builds and supports submarines and a variety of surface ships for the U.S. Navy and commercial customers. The Information Systems and Technology group offers a breadth and depth of technology and service capabilities that support a wide range of government and commercial needs, including systems integration expertise; hardware and software products; and engineering, management and support services. The company employs approximately 90,000 people worldwide.