Scott Pelley: What sort of energy is this that we're talking about?
Mark Lenzi: I believe it's RF, radio frequency energy, in the microwave range.
A clue that supports that theory was revealed by the National Security Agency in 2014. This NSA statement describes such a weapon as a "high-powered microwave system weapon that may have the ability to weaken, intimidate, or kill an enemy over time without leaving evidence." The statement goes on to say "…this weapon is designed to bathe a target's living quarters in microwaves." The NSA disclosed this in a worker's compensation case filed by former NSA employee Mike Beck.
Scott Pelley: When you look back across your career is there any incident that leads you to believe that it could be responsible for your Parkinson's disease?
Mike Beck: Yes.
In the 1990's Beck and an NSA co-worker were on assignment overseas. Years later, he says they developed Parkinson's Disease at the same time.
Mike Beck: In 1996 a colleague of mine, Chuck Gubete, and I traveled to a hostile country and worked there for about a week. And um, I can't say where the hostile country-- the identity of it.
Scott Pelley: Because it's still classified?
Mike Beck: Yes.
But it was not Cuba or China.
Scott Pelley: You believe that you and Chuck Gubete were attacked with this microwave weapon?
Mike Beck: Yes. I had a pretty good working knowledge of the hostile country's intelligence services, what they do to people, what they have done, what their modus operandi is.