A Chinese businesswoman who had a close relationship with Jensen Huang was found to be passing intelligence to Beijing. President Trump was briefed and took no action.
Jensen Huang, the chief executive of Nvidia, is influential at the White House on technology policy and has developed a close relationship with President Trump.
Ukrainian engineers are rushing to perfect A.I.-guided, jet-driven interceptors. Their goal: to stop a fast Russian threat in the latest round of a deadly tech duel.
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