The new Librarian of Congress, Carla Hayden reads a handwritten note left to her by Chief Justice John Roberts after taking the oath of office at the Library of Congress in Washington, Wednesday, Sept. 14, 2016. Roberts', who administered the oath, wrote on the back of the oath card, a note of encouragement in Hayden's tenure as the 14th Librarian of Congress. (AP Photo/Pablo Martinez Monsivais)

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