As far as I am aware, no electronic devices from outside, and no devices that transmit anything, are allowed in these high security areas. That’s inclusive of cell phones, for example.
That is: the point I am making is more nuanced than whether something is popular (like cell phones or other tech).
Oh, I am sure there are restrictions for the rank and file, but the higher ups with such access can ( and apparently do ) get exceptions[1] and while this is one of the more visible examples, I sincerely doubt he is the only one.
That is: the point I am making is more nuanced than whether something is popular (like cell phones or other tech).