U.S. intelligence agencies have said that they have firm evidence of North Korean ballistic missiles being used by Russian troops in Ukraine, among other instances of Pyongyang's help.
Putin, Kim aim to intimidate U.S.: 'There's a price for being Russia's enemy'
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U.S. intelligence agencies have insisted that the incidents were not the result of hostile action, a claim that has angered victims who are convinced they have been targets of sonic weapons or other directed energy.
Intelligence bill eyes commission on Havana syndrome
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