| A Date Which Will Live in Infamy: Attack on Pearl Harbor |
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| A Levee Broke: Hurricane Katrina and America's Response |
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| A Torch for Freedom: Building the Statue of Liberty |
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| A is for Asian American: An Asian Pacific Islander Desi American Alphabet |
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| AI Uprising Hacks |
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| Abby Sunderland: Lost at Sea |
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3.3 |
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| Acupuncturist |
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3.7 |
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| Ada Blackjack: Castaway |
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3.0 |
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| Ada Lovelace |
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1.2 |
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| Adorable Animal Friendships |
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2.9 |
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| Adventure Stories |
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3.1 |
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| Aircraft Carriers |
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3.6 |
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| Alcatraz |
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| Alice H. Parker and the Furnace |
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| Alien Invasion Hacks |
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| Alligator |
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1.6 |
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| Amazing Partnerships |
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| Amazons vs. Gladiators |
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| American Colonies |
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| Ancient Egypt |
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