article_snippet: technology are making it increasingly difficult to combat .
article_snippet: such communications only add to the difficulty of dealing with .
article_snippet: Worrying trend: CIA director John Brennan (pictured), in a speech in New York, said social media and other technology are making it increasingly difficult to combat militants . '
highlights_snippet: CIA Director John Brennan, in a speech in New York, said e-communications only add to the difficulty of dealing with diffuse threats .
  