man could have been working on his own. >> dagen: this is something the counterterrorism policing team in britain has been aware of, on the lookout for, despite britain lowering the terrorist threat level just earlier this month to substantial from seve severe. neil basu, the head of the counterterrorism policing force, we heard from earlier, said at that point that there were still 800 live counterterrorism investigations at that point. 24 attack plots have been thwarted since the westminster attack back in march of 2017. but they were very concerned about lone wolf attacks. the reason the terror threat had been lowered is because of the advancements against isis and the islamic states, that we and other nations had made in the middle east. their resources have been deprived in britain, but they wilwere still concerned about ts type of lone wolf. >> david: these are effective for them. this is what keeps them