Mental Floss

War Machines: The Next Generation of Killer Robots

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by David Axe

The new generation of military robots can hover silently overhead, swarm undetected around enemies, and disable bombs—all without sweating a drop.

Silent Assassins

Predator: The Remote Executioner
The father of the modern war 'bot, the Predator can orbit overhead—unseen and unheard—for nearly 12 hours before needing to refuel. Until 10 years ago, the planes were used only for spying, but then the CIA and the U.S. Air Force equipped them with Hellfire anti-tank missiles. Fortunately, Predators can't open fire on their own; they still require a human operator (or "man-in-the-loop"), who tells them when to shoot via a high-speed satellite link. As a result, soldiers can avoid the line of fire. Recently, a version of the Predator controlled by a secret task force reportedly killed more than 1,000 insurgents in Iraq.

Reaper: Warding Off Aliens

Reaper is like the Predator's brawny, muscle-bound cousin. Weighing in at 5 tons, Reaper can carry 5,000 lbs. of bombs and missiles, yet it's still quiet enough to evade detection. In Iraq and Afghanistan, Reapers have specialized in rescuing cornered ground troops. More recently, however, the American government has been using them for a different purpose—to catch illegal immigrants. In 2005, the U.S. Customs and Border Patrol started flying weaponless versions of the hulking drones to monitor the Mexican border. They're expected to head for the Canadian border later this year.

Lords of the Flies

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Engineers are working to build the first prototypes of the X-47 bombers—unmanned fighter planes that will be able to swarm around the enemy like giant locusts. According to defense-industry engineer Pat Johnson, the goal is to "get the drones to communicate with each other so they can work as a team." They'll be able to "see" each other using radars and cameras and "talk" to each other using radios. They'll also be able to make split-second decisions about maneuvering in the air—all while keeping in constant contact with military planners back at headquarters. Combining all of those features is a tall order for engineers, and it may be another 15 years before the X-47s are ready for action.

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Creepy Crawlies

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ANDROS: The New Bomb Squad
To dismantle bombs, the Israeli army uses a horse-size robot called ANDROS (at left). It can shoot apart booby traps with a shotgun, or it can simply crush bombs with its weight. In February 2008, a terrorist tried to detonate a bomb in the town of Dimona, Israel.

After police shot and killed the bomber, an ANDROS rolled over to inspect and destroy any bombs that might have been strapped to his chest.

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