While Americans brace for a futuristic AI war of killer robots and bioweapons, experts warn ahead of President Xi Jinping's U.S. visit this week that Beijing is already actively undermining America's global supremacy through AI without ever firing a shot.Experts who spoke with Fox News Digital outlined a stealthy, three-part playbook, which includes extracting the logic of American models, undercutting U.S. developers with free open-source software, and ultimately weaponizing those systems for t

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