FILE - Russia's President Vladimir Putin appears on a television screen at the stock market in Frankfurt, Germany, Feb. 25, 2022. Russia is revving up its sophisticated propaganda machine as its military advances in neighboring Ukraine. Analysts who monitor propaganda and disinformation have seen a sharp increase in online activity linked to the Russian state. In 2014, Russia flooded the internet with fake accounts pushing disinformation about its takeover of Crimea. Eight years later, experts say Russia is mounting a far more sophisticated effort as it invades Ukraine. Armies of trolls and bots stir up anti-Ukrainian sentiment. State-controlled media outlets...