>> this mollenbeek neighborhood, people who have been attached to the attack on the jewish grocery store, the guy who was on the train that the americans stopped, everyone seems, a handful of attacks have traveled through mollnbeek. >> you have a problem of arms smuggling and available of buying illegal weapons. that's a toxic mixture. to have an extremist community as long as people express the believes to each other and nobody else, that's their beliefs. >> help us on that. we know it is hard to get a gun or any explosive in france. is it that much easier across the border? >> if you have connections with the right criminal networks, yes. first of all, it's important to understand for decades, eastern europe has been a regular source of supply for illegal weapons of all kinds, including military grade weapons to be brought in