"It’s not true that no one needs you anymore.”These words came from an elderly woman sitting behind me on a late-night flight from Los Angeles to Washington, D.C. The plane was dark and quiet. A man I assumed to be her husband murmured almost inaudibly in response, something to the effect of “I wish I was dead.”Again, the woman: “Oh, stop saying that.”To hear more feature stories, see our full list or get the Audm iPhone app. I didn’t mean to eavesdrop, but couldn’t help it.