Tim Harfmann reports from Manhattan’s Sheen Center, where a screening of ‘A Brave Heart: The Lizzie Velasquez Story’ spotlights the issue of bullying. The 78-minute documentary tells the story of a 27-year-old born with a rare disorder that prevents her from gaining weight. On social media, strangers label her “the world’s ugliest woman” and post hateful comments. Lizzie uses that hate as motivation to help others combat bullying, which often leads to suicide — the third leading cause of death among elementary school children.