Hours before law enforcement forcibly cleared protesters from Lafayette Square in early June amid protests over the police killing of George Floyd, federal officials began to stockpile ammunition and seek devices that could emit deafening sounds and make anyone within range feel like their skin is on fire, according to an Army National Guard major who was there.
Just before noon on June 1, the Defense Department’s top military police officer in the Washington region sent an email to officers in the D.C. National Guard. It asked whether the unit had a Long Range Acoustic Device, also known as an LRAD, or a microwave-like weapon called the Active Denial System, which was designed by the military to make people feel like their skin is burning when in range of its invisible rays.
The technology, also called a “heat ray,” was developed to disperse large crowds in the early 2000s but was shelved amid concerns about its effectiveness, safety and the
ethics of using it on human beings.