Soon after a train derailed and spilled toxic chemicals in Ohio last month, anonymous pro-Russian accounts started spreading misleading claims and anti-American propaganda about it on Twitter, using Elon Musk’s new verification system to expand their reach while creating the illusion of credibility. The accounts, which parroted Kremlin talking points on myriad topics, claimed without evidence that authorities in Ohio were lying about the true impact of the chemical spill. The accounts spread fearmongering posts that preyed on legitimate concerns about pollution and health effects and compared the response to the derailment with America’s support for Ukraine following its invasion...