https://apnews.com/afc211cfd5fb653140f1ff6e5a091870 > SAN FRANCISCO (AP) — Twitter is starting to test tweets that disappear after 24 hours, although initially only in Brazil. > The company says the ephemeral tweets, which it calls “fleets” because of their fleeting nature, are designed to allay the concerns of new users who might be turned off by the public and permanent nature of normal tweets.