joining me now is former deputy director and air force colonel cedrick lateen. also is former director of national cyber security center. when you look at this, you want to be very clear here. what we know is that this program changed four days before this attack and now what is legally allowed is two years of bulk data collection, not five. it's also critical because the wife just came to the united states two years ago. does that make a critical difference in what investigators can gather here, the two versus five years? >> usually most of the things that you see are going to be that immediate period before a a terrorist attack. it you're conducting a law enforcement investigation, you are going to go back from the time of that incident and you will go into their past as much as you can.