they're constantly evaluating threat streams. i'm sure the base commander said that he had indicators or was going to be a terrorist attack. at least there was increase chatter. it's the kind of things the garrison and base commanders get paid to do. they have to assess this. this isn't the first time this has happened that kind of operation that was being planned. a possible hit-and-run or a suicide vest has happened before and they've been thwarted by european forces against u.s. military forces throughout europe. not just in the uk. >> it shouldn't be surprising because isis on social media publicly said to their sympathizers their supporters if you can't come over to syria or iraq and fight there, do some fighting where you are, go out there and attack u.s. military personnel or law enforcement for that matter as well right? >> exactly right. and remember just recently bases in the united states have gone to threat con bravo.