The Justine Sacco AIDS tweet controversy began on December 20, 2013, when Sacco, a PR executive, tweeted a racially insensitive joke about AIDS and Africa immediately before boarding an 11-hour flight with no internet access. During her flight, the tweet went viral globally, leading to the hashtag #HasJustineLandedTrending as thousands of users anticipated her reaction to being fired in absentia. This event is frequently cited by journalists and sociologists as a definitive moment in the history of internet culture, marking the rise of digital public shaming and 'cancel culture.' Today, the meme is used to discuss the consequences of viral posts and the terrifying speed of internet justice.