2017.06 Exposure and arrest of a confidential source
The Intercept published a story that asserted Russian intelligence successfully hacked an American voter registration/polling company, and had used that information to phish state election officials, based on NSA documents they had. The Intercept reporter (Matthew Cole) had shared these documents with another government contractor, seeking to validate them... but the documents had microdots (a digital footprint), which outted their source.One hour after publication, Reality Winner (NSA employee) was arrested by the FBI and charged with Espionage. Two other convicted NSA sources (in other cases), claimed that Cole's actions had lead to their arrests as well. Oh, and the documents showed that the Russians had tried and largely failed to hack the institution, and was irrelevant to the Trump-Russia collusion claims: so was really just a nothing-burger.