we don't want to overreact. >> brown: jessica stern, you've looked at this a lat-- a lot.the internet allows law enforcement to watch what's going on. what issues does it raise for law enforcement? >> well, there are pros and cons both for the terrorists and for law enforcement. it does enable law enforcement authorities and scholars to monitor how terrorists are thinking, how they are recruiting. who they're trying to go after. it's possible to actually converse with them as a colleague of mine jarrett brackman does. but we cannot do what, for example, the saudi government does. the saudi government directly engages youth who are active in jihadi chatrooms. we-- our government really can't do that. >> brown: well, jessica stern, staying with you, what kind of efforts are there, if any. and i don't know how possible this is to reach these young people who might be tempted by foreign terror groups. >> well, one thing to remember is that these are generally young men so far. and the people who are most concerned about young men, for example, joining al-shabob in somalia are