phil carr is the director of forseti training, which trains security officers on how to respond to incidentspe of training needed to manage these types of events. there is a lot that goes on behind the scenes that people don't realise. with risk assessments and planning and everything else. and we look at the security on this. we are already talking about security failings. there are security failings. there are security failings at manchester arena which took years to create. security can make a huge improvement but we do have to be fluid and our approach because things change very quickly leading up to the situation so we need to be prepared for that.- situation so we need to be prepared for that. what kind of security changes _ prepared for that. what kind of security changes can _ prepared for that. what kind of security changes can happen i security changes can happen when things happen so fast? if we have got something like a speeding vehicle, it feels like there is very little that can be done in the moment. the only thing that could have been done is try to secure the area beforehand