The US Justice Department has filed charges against 13 Russian nationals and three Russian groups for interfering with the 2016 presidential election. In an indictment released on Friday (.pdf), the Justice Department called out the Internet Research Agency, a notorious group behind the Russian propaganda effort across social media. Employees for the agency created troll accounts and used bots to prop up arguments and sow political chaos during the 2016 presidential campaign. Deputy Attorney General Rod Rosenstein is expected to hold a press conference on this announcement at 1:15 p.m. ET on Friday.