you mentioned the grieve appses. they are widely shared. what the terrorists have done is they have hijacked muslim grievances. it would be a disservice to the fight against terrorism to conflate the legitimate grievances with the illegitimate actions of a few that are wide by condemned. >> when you were helping the department of homeland security, part of the group trying to get to the bottom of these questions, were they - did you see them over time refining their approach understanding better, able to get a handle on what they were looking for and what the science were. >> one thing that we have done a better job of is how we are talking about violent extremism. you mentioned criticism of president obama's lack of use of islamic terms like jihadist or islamic terrorism. it's interesting. i recently read that osama bin laden, before he was killed had written extensively about his dismay at the lack of the use of the word islamic terrorism on the part of the american government. he didn't like that it was no longer called the war on terror