Terrorism is a criminal act that influences the world. Homegrown terrorism and radical Islamic terrorism are the two major national security threats in the United States in the 21st century. The strategy of terrorists is to commit acts of violence that draws the attention of the public, the government, and the world to their cause. The terrorists plan their attack to achieve the greatest publicity, choosing targets that symbolize what they oppose. The effectiveness of the terrorist act lies not in the act itself, but in the public's or government's reaction to the act.
In response to the terrorist attacks of September 11, 2001, the United States government passed a bill known as the Patriot Act, signing it into law on October 26. The Patriot Act called for the formation of a Homeland Security Department whose main job is to put a stop to terrorism. To accomplish this task, each state created its own Homeland Security force. The state agencies coordinate with federal agencies to share information and stop terrorist attacks before they can occur.
Homegrown terrorism and Radical Islamic Terrorism are the two major national security threats in the United States in the 21st century. The concept of terrorism is very hard to define, however, Webster's College Dictionary defines terrorism as: "the use of violence and threats to intimidate or coerce especially for political purposes, the state of fear so produced and government or resistance to government by means of terror." In its biggest sense, terrorism is the threatened use or actual use of force against individuals or nations to bring about social or political change. It is carried out because of the impact of fear, confusion, and submission it will have. .
Violent Islamist extremism refers to the idea of creating a global state that would put into effect the most radical version of Islamic law and the use of violence against non-Muslim military personnel and civilians and Muslim opponents.