Detailed text transcripts for TV channel - CNN - 20180607:21:52:00
Were signs that surveillance devices were detected as early as last year near the white house. the devices are called sting rays. or international mobile subscriber identity catchers. and they're not only illegal for nonlaw enforcement usage in america. they're capable of gathering a lot of secret information. >> it pretends it's a cell phone tower. your phone will collect to it and it'll collect things like the device number. it knows who you are. records of who you communicate with. even sometimes the contents of your communications. >> reporter: the department of homeland security isn't say...
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