This Broadcast
Modern Marvels
04:00 am - 05:00 am Saturday, August 22
The Real National Treasure
Season 15 · Episode 22
The U.S. Library of Congress is explored. Included: secret vaults with more than 600 miles of shelves; George Washington's handwritten diaries; and the original film of the 1931 movie "Frankenstein." Also: how the contents are cataloged and preserved.
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