Lockheed Martin Corp. is a global security company based in Huntsville, Ala. It is an information technology (IT) development and integration firm managing data and technology infrastructures as well as integrating complex IT systems. The company's platform integration capabilities span homeland security, space, air, land, sea and undersea missions. Lockheed Martin Corp.'s supported legacy aircraft include Air Express, Model 4 Explorer, PV-2 Harpoon, PV-1 Ventura, Constellation and Lasa 60. The firm offers a range of products, including air traffic control simulation systems, all source analysis system and automated flight service station.