In 2016 and '17, 25 Americans who worked in the U.S. Embassy in Cuba suffered serious brain injuries causing impaired vision and memory loss among other persistent symptoms. At least 15 U.S. officials in China suffered unexplained brain trauma soon after

In 2016 and '17, 25 Americans who worked in the U.S. Embassy in Cuba suffered serious brain injuries causing impaired vision and memory loss among other persistent symptoms. At least 15 U.S. officials in China suffered unexplained brain trauma soon after https://t.co/aW2VDb8kuk

— 60 Minutes (@60Minutes) March 17, 2019