Circa 2015
The Plasma Acoustic Shield System (PASS) is a crackling, flashing wall of light hanging in the air up to 100 meters away. And while it’s the stuff of sci-fi, the laser-powered PASS already exists in prototype form, built by Stellar Photonics of Redmond, Wash., with funding from the Pentagon’s Joint Nonlethal Weapons Directorate (JNLWD).
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