Maybe this?
In the 1964 presidential election, Johnson ver Goldwater, there was a campaign issue of U.S. preparedness against the U.S.S.R. Nuclear threat. The Goldwater side asserted that we were vulnerable to EMP. The Johnson Administration claimed there was no such thing as EMP. At the same time, the IEE's (IEEE) technical journal, Spectrum, just happen to publish an article, written by several Bell Labs engineers,
on how to harden telephone communications systems against EMP.
The article showed how a repeater building could be constructed using interconnected conductors in the building's construction such that they acted as a "squirrel cage rotor" as in an A.C. motor--a shorted turn; this was covered by continuous copper Faraday shielding,
allowing no unexposed openings. Additionally, there were buried triple shielded coax conduits coming and going from the building, with four #8 copper cables buried adjacent to the conduits.