but for the most part, everyone remained calm, just trying to figure out, ana, what exactly happened. >> exactly. and cnn global affairs analyst david rhode is joining us on the telephone. police aren't sure if this is a terror attack, they have one person in custody. presumably they are interviewing this person right now and they believe this is the driver of the vehicle they are talking to. you say this is exactly what isis wants. >> again, we don't know what happened, but if this was some sort of retaliatory attack on muslims, they do want to sow division. they do want people of different faiths, christians frankly versus muslims carrying out these kind of attacks. it's a step backwards. i mean, whoever carried this out thinks he's going to somehow, you know, slow this down or this is going to cause radical muslims to stop their attacks,