this whole story, there is one issue that is missing right now. jihadists terrorist, that is terrorism, we need to know what is the network that is basically inducting these people so that they become terrorists. >> trace: i have to go, but some of these countries that talk about vetting, yemen, these are failed states, we cannot get the information out of there, they do not have the information to give that are coming that way. it is a very difficult task. >> that is very true, but remember that the president addressed 50 arab and muslim leaders, a system of counterterrorism. and a lot of things that have been launched. we need to figure out how we are going to apply it in the world of reality. >> trace: dr. walid phares, always good to see you. and coming up today, the terror attack in barcelona is the latest in an ongoing wave of vehicle assaults in europe. why is the continent having so much trouble stopping them?