FILE - In this May 9, 2018, file photo, a woman votes in Sandy Springs, Ga. It’s been more than three years since Russia's sweeping effort to interfere in U.S. elections through disinformation on social media, stolen campaign emails and attacks on voting systems. U.S. officials have made advances in trying to prevent similar attacks from undermining the 2020 vote, but challenges remain. (AP Photo/John Bazemore, File)
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