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Season 17, episode 13. Keep your place, move between servers, and stay ready for the next episode.
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Poisoned Winds of War
Sixty-five years after attempts to ban them, chemical weapons pose more of a threat than ever. NOVA looks at the problem of controlling substances that are easily produced and cruelly effective.
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Episode 1: Poison in the Rockies
Episode 2: Race for the Top
Episode 3: Disguises of War
Episode 4: The Bomb's Lethal Legacy
Episode 5: The Big Spill
Episode 6: The Genius That Was China: Rise of the Dragon
Episode 7: The Genius That Was China: Empires in Collision
Episode 8: The Genius that Was China: The Threat from Japan
Episode 9: The Genius That Was China: Will the Dragon Rise Again?
Episode 10: The KGB, The Computer and Me