Special counsel Robert Mueller on Friday obtained an indictment of 12 members of a Russian military intelligence agency for hacking Democratic party emails during the 2016 election—a rebuke to President Trump, who has refused to fully acknowledge Russia’s election interference, just three days before his planned meeting with Russian President Vladimir Putin in Finland. The indictment, announced Friday by Deputy Attorney General Rod Rosenstein, will probably not lead to immediate prosecutions—it doesn’t accuse any Americans of crimes, as the White House was quick to point out, and it’s unlikely that Russia will allow extradition of its own officials—but the charges are still a big deal in the Trump-Russia investigation and they offer extensive new details on how the Russian hacking effort actually worked. Here are some of the key takeaways: Mueller may be laying the groundwork for charges against Americans The special counsel charged the 12 Russians with “conspiracy to commit an offense against the United States.” The indictment says the object of that conspiracy was “to hack into the computers of U.S.