<span>The intent of terrorism is to produce fear in order to obtain political objectives. The main purpose of a terrorist attack is to generate fear to people. That is the reason why they happen unpredictably and commonly include civilian victims. Almost these attacks aim for political objectives. Even though it doesn’t seem have a reasonable way of attaining that purpose to civilians but to the terrorist doing it makes sense.</span>
I don't think they serve for life but more they serve for a many number of years,and then retire. but the federal government appoints them to those terms.