The vehicles will use digital cameras, radar and sonar, married with sophisticated home-grown software, to pick and ping their way through the desert.

ECONOMIST: MONITOR: Robots, start your engines | The

They also use more sophisticated equipment, such a GPS tracking devices and radar, to stalk their prey.

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But the new aircraft will be much more sophisticated, will be far less visible to enemy radar and will have sensors that allow a single jet to take on missions that now require several aircraft.

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Never mind that the Kremlin's obsolescent radar is not designed for the kind of sophisticated discrimination of warheads from decoys inherent in the proposed, modern American system.

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