dan, i'm focusing in on the language, a specific credit threat and we have tight time frame, 24 to 36 hours give me a time frame what that language means? >> it definitely means there is a threat out there, an acute threat. remember we've been tracking these threats sometime. it is possible that isis fighters conducting pre-attack surveillance of the airport. they have been doing that on foot for quite sometime. we may have gotten chatter from some of the isis operatives. what i emphasize. will: i've been in this position many times in the war zone, there are three things you want to do when you collect this sort of intelligence even if the is not 100% accurate or even not as detailed as you like. you like to get off the x. we know that is not possible. we can't leave the airport. secondly, we're defending at the