By banning satellite television and jamming foreign radio broadcasts, the government keeps undesired information from entering the region.

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One Navy engineer gave a presentation detailing the nine months he spent hacking insurgent bombs, jamming their radio frequencies to prevent detonation.

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It's capable of jamming most radio-controlled IEDs, according to the Pentagon.

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Attacks like the "evil twin" disrupt a company's network from the outside, jamming its radio signals or bogging it down with a denial of service attack, then broadcasting a counterfeit signal into the building.

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In Pakistan's war zones, a policy based purely on jamming, and confiscating kit, would upset local Pushtuns, for whom radio is a vital medium.

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