The World Meteorological Organization found that our planet is on track to break record levels of heat over the next five years And we may pass a major climate change threshold. MSNBC's Ali Velshi joins us. And, Columbia University professor Katherine Keyes talks about the Centers for Disease Control and Prevention report that found drug overdose deaths increased by 2% last year. Then, between 1976 and 1982, Donna Summer had more top-10 hits than any other recording artist. Now, the new documentary "Love to Love You: Donna Summer" tells the singer's whole story. Summer's daughter Brooklyn Sudano made the movie. We speak with Sudano.