prime minister this morning. she highlighted four things that need to change and one of them she talked about government is working together to regulate the safe spaces for the extremists. what will that look like and the potential for that happening? one of the former chief supervisor of the police there saying sprirt and facebook need to sma some control. >> that is a lot years said than done and i'm not sure it's a good idea. start with the first amendment in this country in the united states doing what the prime minister is suggesting, i think, would be impossible. in fact, twitter has been pretty aggressive taking down hundreds of thousands of pro isis accounts. facebook has a whole division within the company which is basically trying to monitor these kind of, you know, isis messages and taking them down where appropriate. where it gets difficult, take