In 2016, a handful of American and Canadian government employees working in Cuba came down with mysterious symptoms: nausea, ringing ears, headaches, and minor memory loss.

Their illness came to be known as Havana Syndrome. Theories about what caused it have included microwaves fired by Russia, insecticides, and even crickets.

Now, a new report from US intelligence agencies rejects the idea that an enemy with an energy weapon is to blame.

Shane Harris is an Intelligence and National Security Reporter for the Washington Post. He has spoken to sources who’ve seen the new report, and walks us through its findings.

For transcripts of this series, please visit: https://www.cbc.ca/radio/frontburner/transcripts