"The incidence of international terrorism has been, increasing over time. Mary of these terrorist attacks have been directed against U.S. interests, personnel, and facilities abroad. The threat of future terrorist attacks has an impact on the work and quality of life of U.S. government personnel assigned overseas. To better understand the nature and scope of this issue, the authors first explore terrorism defining it, highlighting its principle causes, describing sample of active terrorist groups, and reviewing terrorist tactics and targets."
Defense Technical Information Center (DTIC): http://www.dtic.mil/dtic/