and they -- you know you never know when they're going to get all their things together. once you have your explosive you can't wait forever. it's almost like once you've create the or obtained your explosive you -- the clock is running. you have to do an attack. so depending on their logistics they looked for the one target they could hit before time ran out on the explosives. >> lisa, as you said, a short time ago, the question of inspired or directed is kind of a blurred line in this day and age. are you surprised we haven't seen any group jump on the band wagon publicly and claim some port of the warped glory. >> it's a touch too soon. usually the next day we soo about 12 to 24 hours later whether it was isis or al qaeda they'll take responsibility usually in the suicide bomber left a note that will tell us more. or facebook pages and some sort of identification will lead