These people cannot achieve the changes they desire through the normal political process and resort to violence. Most acts of terrorism are committed to gain publicity for their organization and purpose, to achieve political goals, or to obtain arms or financing for future operations. By performing sensational acts that attract media attention and outrage from the public, terrorists seek a government reaction that will further their cause. Most terrorist operations are planned and carried out with considerable expertise. Terrorists seek to exploit the target's vulnerabilities and, with the exception of suicide attackers, minimize their own risk.
Bombings are the most common.
All are, in their most basic form, simple criminal acts. The manner in which they are carried out, the victims that are targeted, and the desired media and political outcome are the only differences between terrorists and common criminals. Regardless of the country in which you may reside or travel, some threat of crime will always exist. In many areas, crimes against persons and property are increasing. Several factors account for this, to include the relaxing of border controls in Europe, which has permitted greater freedom of travel.