The U.S. military has unveiled its newest approach to crowd control, the Active Denial System, a heat ray that sends out a high-frequency electromagnetic ray. People hit with the ray feel an intense, unbearable heat.  The military touts the ray's "far-ranging" capabilities and is looking at "many different applications" for its possible use.

Marine Col. Tracy Taffola said at the public unveiling of the system at a U.S. Marines base near Washington, D.C.:

"You're not gonna see it, you're not gonna hear it, you're not gonna smell it: you're gonna feel it." 

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In a video to demonstrate the new weapon, USFORCESTV explains that the heat ray "boasts a reach far beyond any other non-lethal system" -- a reach of "about 7 footballs fields."

The video shows various volunteers quickly running away from the heat ray, a situation unlikely to be available when the ray is aimed at a large crowd or if protesters are penned in in some way, as was witnessed by the pepper-spraying of Occupy protesters by police officers at very close range.