Jonathan Capehart fills in for Leonard Lopate. On today’s show: Dr. Robert Lustig explains how all the sugar in the American diet has led to chronic disease, and how to cut sugar, increase fiber, and be healthier. Grammy Award-winning Jazz vocalist and pianist Diane Schuur discusses her upcoming album, “I Remember You: With Love to Stan and Frank,” and performing at Birdland. Filmmaker Mary Fishman discusses her documentary, “Band of Sisters,” about nuns who advocate for the rights of immigrant detainees. And this week’s Please Explain is all about cyber security and how to protect your personal information online.