Now Pam Livengood comes to the stage to tell her family's story of substance abuse and the growing epidemic in the country.
Singer Demi Lovato, who has struggled with addiction, is telling her story.
First lady Michelle Obama gave a forceful, impassioned defense of Democratic presidential nominee Hillary Clinton, casting her as the only candidate who can be trusted as a role model for the nation's children. Obama was among the power lineup of speakers taking the stage in Philadelphia at the Democratic National Convention. The convention’s first day was embroiled in controversy over leaked emails that showed how party leaders sought to ease Clinton's path to the nomination by mocking her challenger, Vermont Senator Bernie Sanders.