The Justice Department said Tuesday it had uncovered and dismantled a Russian propaganda network with nearly 1,000 accounts pushing pro-Russia posts on the social media platform X. The accounts on X posed as Americans, including a bitcoin investor in Minneapolis, but in reality they were masks for Russian operatives who had the approval and financial support of the Kremlin, the Justice Department said in court affidavits and in a news release. The Russian operatives made the fictitious accounts with the help of artificial intelligence, which made it easier to produce images and generate text, the department said.