Mark Memmott Mark Memmott is NPR's supervising senior editor for Standards & Practices.

Do you have some free time this Labor Day weekend? Spend it reading about a fascinating frame-up — or pondering the long hours we work. Here, travelers wait for trains at Union Station in Washington, D.C., on Friday, the start of the holiday weekend. Chip Somodevilla/Getty Images hide caption

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Chip Somodevilla/Getty Images