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Why GPS Is Under Attack
Satellite signals run the modern world. See just how vulnerable they are.
The American GPS network that was once the gold standard is at risk of becoming a relic as Chinese, Russian and European systems modernize. These superaccurate satellite clocks also help synchronize computer systems, like those that tell stock markets whose trades arrived first. While planes have backup safety systems, spoofing nearly sent a business jet into Iranian-controlled airspace last year.
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