Tonight we have important developments in our five-year investigation of mysterious brain injuries reported by U.S. national security officials. The injured include White House staff, CIA officers, FBI agents, military officers and their families. Many believe that they were wounded by a secret weapon that fires a high-energy beam of microwaves or ultrasound. This is our fourth story and as we reported in March, we now have evidence of who might be responsible. Most of the injured have fought for America, often in secret. And they're frustrated that the U.S. government publicly doubts that an adversary is targeting Americans. One of them is Carrie. We're disguising her and not using her last name because she's still an FBI agent working in counterintelligence. She says, in 2021, she was home in Florida when she was hit by a crippling force.

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