In 2019, Scott Pelley first reported on a troubling phenomenon affecting dozens of American officials returning from assignments in Cuba and China. These individuals came home with unexplained brain trauma, raising serious concerns about their health and safety.

Evidence suggested that this brain injury might have been caused deliberately. Investigations indicated that another government could have used a weapon designed to inflict harm without leaving any trace. The mysterious nature of the injuries has prompted ongoing inquiries into the potential source and motives behind these attacks.
https://www.cbsnews.com/video/targeting-americans-2019-60-minutes-archive/