kansas man's alleged plot to bomb a u.s. army base. the justice department says that alexander blair knew about john booker's plan to try and detonate what would be a suicide car bomb at ft. riley. booker was arrested as he made his final attempts to detonate the bomb. the bomb actually turned out to be a fake. it was a decoy planted by the undercover feds who thought -- who he thought were his co-conspirators. joining me to talk about the bob bear cnn intelligence analyst and former cia operative. when you look at this this is just another example of the lone wolf threat. the threat that homeland security secretary jeh johnson said is of such concern and that is really the toughest thing for law enforcement in this country to go after. how do you tackle something like this? i mean thank goodness there were undercover agents in this case. but there aren't always. >> well poppy, i think we've gotten very lucky. these kids and they are young, go up on social media and you can see the pattern of their