Attorney General William Barr told Congress on Sunday that special counsel Robert Mueller concluded there was no criminal collusion between the Trump presidential campaign and the Russian government.

Over the course of the years-long Mueller investigation, some of the media’s biggest stories resulted in retractions, apologies, and even departures. Some reports, many of which relied on unnamed sources and remain uncorroborated, have never been retracted or corrected. One such story was even refuted by the Special Counsel’s Office in a rare public rebuke.

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