This stunning revelation at the #ImpeachmentHearings shows the unacceptable lack of cybersecurity by the @realDonaldTrump Administration. Any foreign power can listen in on a cell phone by exploiting a flaw known as "SS7." Look it up. It will scare you. https://t.co/mZZ7B2IHK2 https://t.co/1J7PUd8yGK— Ted Lieu (@tedlieu) November 13, 2019