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Shooting PainThe future of heat-beaming weapons.

By William Saletan
Posted Saturday, Feb. 17, 2007, at 6:27 AM ET
Illustration by Rob Donnelly. Click image to expand.

If you're worried about terrorism, upset about the war in Iraq, and depressed by global chaos, violence, and death, cheer up. We've just invented a weapon that fires a beam of searing pain.

Three weeks ago, the U.S. armed forces tested it on volunteers at an Air Force base in Georgia. You can watch the video on a military Web site. Three colonels get zapped, along with an Associated Press reporter. The beam is invisible, but its effects are vivid. Two dozen airmen scatter. The AP guy shrieks and bolts out of the target zone. He says it felt like heat all over his body, as though his jacket were on fire.

The feeling is an illusion. No one is harmed. The beam's energy waves penetrate just one-sixty-fourth of an inch into your body, heating your skin like microwaves. They inflame your nerve endings without actually burning you. This could be the future of warfare: less bloodshed, more pain.

Military technology has always sought greater precision from longer range. In the Gulf War, Kosovo, and Afghanistan, we exploited the increasing accuracy of laser-guided bombs. In the post-9/11 terrorist hunt and the occupation of Iraq, we've sent hundreds of remotely piloted aerial drones to spy and kill. But the lives protected by drones are ours. The pain beam is more ambitious: It can spare civilians and even the enemy. Precision isn't just the ability to kill. Sometimes, it's ability to disperse and deter without killing.

That kind of precision is becoming more important. Twelve years ago, the Department of Defense observed that our armed forces were increasingly being used for peacekeeping, humanitarian aid, and protection of civil society. More of our enemies were blending in with, or disguising themselves as, civilians. Through the media, more eyeballs, hearts, and minds could see the infrastructure we destroyed. The DOD proposed the development of weapons "to incapacitate personnel or materiel, while minimizing fatalities, permanent injury to personnel, and undesired damage to property and the environment."

Like lethal weapons, nonlethal weapons have evolved from short- to long-range. Batons and pepper spray required hand-to-hand combat. Water cannons, rubber bullets, beanbag rounds, and sting ball grenades have extended our reach, but not far enough to keep soldiers clear of rocks or small-arms fire. Some of our weapons are insufficiently discriminate. Tear gas torments a whole crowd, not just the miscreants using it for cover.

Projectiles are also unpredictable. At long range, particularly in crosswinds, rubber bullets can hit the wrong people, or the right people in the wrong places. At close range, they can kill. Look at the absurdly named "FN303 less lethal launcher." It's supposed to fire "non-lethal projectiles at established non-lethal ranges." But when you're launching things, less lethal is the best you can do.

That's where the pain beam comes in. Unlike projectiles, beams are "directed energy." They travel in a straight line over long distances, ignoring gravity and wind. They cause no more damage at 10 feet than at 1,000. Unlike gas, they're discriminate. Raytheon, the pain beam's manufacturer, points out that the weapon "allows precise targeting of specific individuals" and that the pain "ceases immediately" when the beam is diverted or the target flees.

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William Saletan is Slate's national correspondent and author of Bearing Right: How Conservatives Won the Abortion War.
Illustration by Rob Donnelly.
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