Professor Sheryll Cashin of Georgetown Law discusses a federal judge ordering a slavery exhibit to be restored after it was removed by the Trump administration.  Then Professor Pat Parenteau of the Vermont Law & Graduate School, discusses the first lawsuits over the EPA's revocation of a major climate finding.  And Bloomberg Legal Reporter Madlin Mekelburg discusses Mark Zuckerberg's testimony at the first social media addiction trial.  June Grasso hosts.