Defining Terrorism

Compare and contrast the different definitions of terrorism.  Most definitions include the use of violence to create fear. The  Department of State focuses on sub-national groups. The Department of  Defense includes the threat of violence. The Federal Bureau of  Investigation notes that terrorism is illegal. The Department of  Homeland Security concentrates on critical infrastructure.

In a two to three page paper (not including the cover page an  reference page), compare and contrast these definitions; identifying the  similarities and the differences.