18 various agencies and offices that make up the U.S. Intelligence Community

  How would you categorize the 18 various agencies and offices that make up the U.S. Intelligence Community? In other words, are there groupings you can place some agencies into together based on purpose or typology and what might these groups be?Part II: Discuss four members of the U.S. Intelligence Community that you think are the most important players in supporting the Homeland Security Enterprise with intelligence.Part III: Do you think it is really necessary that the U.S. has all of these 18 intelligence agencies? What would be your recommendation?