[pepve]

"[...] where adversaries can exploit American communications systems, cell phones and the electromagnetic spectrum." (emphasis mine)

Wait, what?

[ryanmercer]

>the electromagnetic spectrum

EMP, signal jamming, GPS spoofing etc.

[erikbye]

This is why TEMPEST is critical.

[godelski]

> the electromagnetic spectrum.

It is an all inclusive term. So this includes things like radio.