Over the last seventeen years, sixteen bombs have been sent by mail to various destinations, and all but one have resulted in injury or death. The FBI has very few clues as to the perpetrator, who has come to be known as "Unabom," due to the bomber's propensity to target universities and airline employees. The latest attack happened in Sacramento, killing Gilbert Murray, president of the California Forestry Association.
   The Unabomber has sent letters to newspapers acknowledging the bombings and stating reasons for the choice of targets. He always refers to himself as "we," which refers to "the terrorist group FC." However, the FBI believes that the bombings are the work of one person. He states in his letters that FC is a group of "radical environmentalists," and that they intend to "promote social instability in industrial society, propagate anti-industrial ideas and give encouragement to those who hate the industrial system." The individuals who received the packages were usually workers in computer and electronics fields, although some of the early bombings targeted airline employees.
   The bombs themselves were meticulously assembled pipe bombs housed in homemade wooden boxes. FBI sources say that the bomber spent hours filing bits of metal, making his own screws, and whittling wooden levers, in the process of building the bombs. Agents suspect that the Unabomber is based in northern California, because all the bombs were mailed from Oakland, and in the letters the bomber describes "searching the sierras" for test sites.
   The Unabomber has offered a "bargain," however; he says the bombings will stop if a nationally prominent news publication such as the Times publishes FC's tract explaining the group's ideas. While the idea is under consideration by some publications, they hesitate to give in to the demands of a terrorist, and there is certainly no guarantee that the bomber is telling the truth. Even if the demand is met, he still plans to commit "sabotage" against property.
   The bombings committed by the Unabomber have no connection to the Oklahoma bomb, which was a completely different type of explosive device.