Diane Rehm, who hosted “The Diane Rehm Show” for 37 years, has been a vocal advocate in the “right-to-die” movement, after witnessing her husband’s pain as he succumbed to a long, terminal illness. She joins host Krys Boyd to talk about the idea, which she writes about in “When My Time Comes: Conversations About Whether Those Who Are Dying Should Have the Right to Determine When Life Should End.”