2. Martha Crenshaw said that terrorism means socially and politically unacceptable violence aimed at an innocent target to achieve a psychological effect. She also sited three criteria to make it a terrorist attack. The first is that there must be military methods used. Second there must be a military target involved, and finally there must be some chance of victory.
3. J. Bowyer Bell stated that there are six types of terrorism, and each part has a purpose. The six are; psychotic which attempts to achieve psychological gratification. The second is criminal witch attempts to profit the terrorist. Next there is the vigilantly type of terrorism witch attempts to achieve retaliation for some act, fourth there is endemic terrorism; witch is an internal struggle of some type. The fifth type of terrorism is authorized terrorism, which deals with state repression