Facebook Is Adding Unsend Message Tool After CEO Caught Unsending

Sheryl Sandberg Says She 'Believes Deeply' in Zuckerberg's Leadership
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Facebook Inc. is planning to introduce a feature letting users of its Messenger app retract messages after a report that Mark Zuckerberg, Facebook’s Chief Executive Officer, used an early version of the feature without telling anyone.

Techcrunch reported late Thursday that multiple people saw Messenger missives from Zuckerberg disappear. Facebook said the feature was developed after the Sony Corp. data hack in 2014, which exposed a trove of sensitive internal communications. So Facebook created a capability that let executives expunge their app messages after a period of time.