The past week marks one year since the Seigenthaler incident, one of the defining events in the history of Wikipedia. The project's credibility, and what measures to pursue in ensuring it, are still subjects of debate today.
To review the incident: A year ago on 29 November, retired journalist John Seigenthaler Sr. wrote an editorial complaining about falsehoods in his Wikipedia biography. These had actually been written in May and removed in October after he contacted Jimmy Wales, but the article in USA Today nevertheless gained considerable media attention. The story remained in the news for a couple of weeks and is still regularly cited as a canonical illustration of the potential for misinformation on Wikipedia.