Meet Leon Theremin, a Russian physicist, inventor, and musician, who developed not only a musical instrument that can be played without being touched, but also a spying device that was successfully planted in the U.S. ambassador's residence in Moscow.
For more explainers, graphics and videos, visit: https://www.rferl.org/Multimedia or follow us on:
We report the news in 22 countries without a free press. Our journalists are a unique source of information from the front lines. https://www.rferl.org/
#theremin #inventor #history