carried out raids on properties in the city this morning. you're seeing some aerial video here. authorities do not believe there are any additional elements after the attack, so the threat level has not been increased. the london attacks started with a vehicle ramming into pedestrians are london bridge. and this use of a vehicle in terror attack is becoming really a new mode of attack for self-radicalized terrorists. is this the most popular now a weapon that is being used? >> cnn national security analyst peter bergen and paul crookshank is with us. let's talk about that and something we have not mentioned today just yet. ramadan. the timing of this. isis has called on followers to attack where they can with what they have at hand. so, paul, do you believe that we will see more of these attacks through june 24th now that we are in the holy month of