that they have been concerned for months that president trump is discussing sensitive information on an unsecured phone with informal advisers that include his friend sean hannity at fox. clint, this isn't social media hacking. this is cell phone hacking. just quickly explain to me the technology here. when we say the chinese are listening on his cell phone, he's on there talking with his buddy. walk us through the process. >> one of the weaknesses of our cell phone architecture is the towers and the signals that traffic through them. o so when we talk about hacking, we're not necessarily talking about this phone. they are not inside that phone.