Mark Thompson, Time Magazine, March 8, 2015

If a foe disables or destroys GPS, Pentagon still needs to drop bombs accurately

The success of precision-guided bombs in 1991’s Gulf War was a revelation. The world watched transfixed as U.S. generals briefed before screens showing scratchy black and white videos of American weapons blasting bridges, buildings and brigades with amazing precision. Potential foes were dutifully impressed, and have spent a lot of time figuring out how to disable or destroy the satellite-based Global Positioning System that have since cheaply turned dumb bombs into smart ones—and gets the planes carrying them to the right spot.

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