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Internet Research Agency

Most of the Twitter accounts that spread disinformation during the 2016 presidential campaign remain active now, according to an ambitious new study released on Thursday.

Knight Foundation researchers examined millions of tweets and concluded that more than 80 percent of the accounts associated with the 2016 disinformation campaign are still posting — even after Twitter announced back in July that it had instituted a purge of fake accounts.

Russia's information attack against the United States during the 2016 election cycle sought to take advantage of the greater trust that Americans tend to place in local news.

The information operatives who worked out of the Internet Research Agency in St. Petersburg did not stop at posing as American social media users or spreading false information from purported news sources, according to new details.

They also created a number of Twitter accounts that posed as sources for Americans' hometown headlines.