No evidence this has been used in the US, but I can't help but wonder when computer manufacturers will be required to add another piece of hardware.
http://m.cnet.com/news/nsa-reportedly-using-radio-waves-to-tap-offline-computers/57617244
Sorry for the mobile link, all I can get.
http://m.cnet.com/news/nsa-reportedly-using-radio-waves-to-tap-offline-computers/57617244
Sorry for the mobile link, all I can get.