General Dynamics 

General Dynamics is a defense contractor and business jet manufacturer. The firm's segments are aerospace, marine, combat systems, and technologies. General Dynamics' aerospace segment manufactures Gulfstream business jets and operates a global aircraft servicing operation. Combat systems produces land-based combat vehicles such as the M1 Abrams tank and Stryker armored personnel carrier, as well as munitions. The marine segment builds and services nuclear submarines, destroyers, and support ships. The technologies segment contains two main units: an IT business that primarily serves the government market and a mission systems business focusing on electronics that provide command, control, computing, intelligence, surveillance, and reconnaissance capabilities to the military.