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In this chapter, different security-related examples are shown in SGL dealing with discovery, tracing and analysis of multiple mobile objects, technical or human, in distributed environments. Starting from how overall command and control of a hypothetical missile defence can be automatically managed in SGL by following and supervising the movement of multiple ballistic missiles on their full path from discovery to elimination. Other case is dealing with fully distributed tracing of cruise missiles with complex and tricky routes, which can be effectively chased, analysed and controlled by mobile spatial intelligence spreading through intelligent sensor network. Another one is providing high-level simulation and tracing of multiple objects in outer space to avoid collisions for new vehicles launched, with engagement of scattered space observation sensors integrated under SGT. The chapter also shows how to organize distributed simulation, assistance and control of flow of refugees through international borders.

If aeroplanes and passengers, as well as property and people on the ground are to be protected, potential perpetrators of aviation terrorism must be prevented from breaching security checkpoints and gaining access to ‘secure’ airport areas and to aircrafts. Given the interconnectedness of the air transportation system, a sufficiently high level of security must be provided throughout the entire system. In this chapter we examine terrorism issues relevant to airline and airport security internationally, a topic that has received much attention since 9/11. Understanding the key issues is crucial in evaluating the various methods of regulating and providing aviation safety and security. The purpose of this chapter is to review the key features of the Aviation and Transportation Security Act and the characteristics of the resulting security policy. Then we examine terrorism, previous terrorists' acts against aviation as well as current and future aviation threats. A summary of our major points completes the chapter.