In the world exist many deffinition of terrorism. But everywhere terrorism means the same. Terrorism is a criminal act. Many countries used terrorism programs to protect against attacks. Terrorism create international net terrorist organization. In recent times, the popular image of a terrorist group operating according to a specific political agenda and motivated by ideology or the desire for ethnic or national liberation dominated our understanding of terrorism.It's important to understand that actual terrorist operations are the result of extensive preparation and support operations. Media reporting and academic study have mainly focused on the terrorists' goals and actions, which is precisely what the terrorist intends. This neglects the vital but less exciting topic of preparation and support operations. Significant effort and coordination is required to finance group operations, procure or manufacture weapons, conduct target surveillance and analysis, and deliver trained terrorists to the operational area