Terrorist strategy used between the 1950s and present day and is a threat to the United States

  Write an essay on a terrorist strategy used between the 1950s and present day and is a threat to the United States and its national interests     include a brief history of the strategy as well as answer the following questions: Why is this a terrorist strategy? Which terrorists use this strategic method? Why? When is this strategic method effective? Why? What are the flaws of this strategy? Why? and What infrastructures support the use of this method as part of a terrorist strategy? How and Why?