X community adds a context note to a user's post: An X (formerly Twitter) user posted "If you still don’t know this. The planes were digitally inserted into the videos. The buildings - all 3, were rigged to blow. The Pentagon was hit by a cr. missile. The The17Letter." The X community added a note to the post that read: "Readers added context they thought people might want to know. Conspiracy theories still persist. On the morning of 9/11/2001, a tragic event unfolded when al-Qaida-affiliated terrorists hijacked four commercial airliners and carried out devastating attacks. These attacks resulted in the loss of thousands of American lives. usatoday.com/story/news/fac… theguardian.com/world/2011/sep… bbc.com/news/58469600 en.wikipedia.org/wiki/List_of_c…" The label is part of X’s Community Notes system. X users are able to sign up as contributors to add context to posts. X owner Elon Musk shared that any post with a Community Note added to it will be demonetized. The Community Notes account on X also posted that notices will be pushed to users who previously engaged with a post when a Community Note is added to it later.