U.S. May Have Suspected 'No Trace' Weapon Against Spies Decades Ago

The transcript discusses mysterious health incidents affecting U.S. personnel globally, including symptoms like vertigo and tinnitus. Mark Polymar Opolis recounts his experience in Moscow, similar to cases in Cuba, China, and near the White House. Legal actions are ongoing, with historical evidence suggesting foreign involvement. Scientists suspect directed energy as the cause, but investigations remain inconclusive, with Russia as a leading suspect.

What are the possible causes of the injuries mentioned in the text according to government scientists?

What is the suspected origin of the attacks as mentioned in the text?