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The Tesla CEO took the witness stand in a Los Angeles courtroom Wednesday in a trial centered on public discourse on social media.

The moderators are frequently tasked with watching disturbing video and images of child sexual abuse, violence, animal cruelty and more.

Tesla CEO Elon Musk had a few words for the author who retold the story of his longtime assistant.

Jay Z's music-streaming service has had high turnover since it launched in March. Jeff Toig, formerly of SoundCloud, is now at the helm.