attorney general william barr asking facebook to postpone its plans to encrypt user's messages. you have our attention at facebook. privacy concerns. what about the encryption? what are they looking to do here? >> facebook wants to get it all into one system and encrypt it. end-to-end encryption. when i send a message to you the whole way it travels on the internet nobody can see what it is saying until it gets to your inbox. d.o.j. says we need some kind of back door access. what if people are talking about child sex trafficking or terrorism or illegal activities. we need to be able to see that and monitor that. and this is kind of what it comes down to is where do we draw that line of you have an expectation of privacy so long as you are following the law