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Why Planes Vanish Preview
Can new technology prevent aircraft like Flight MH370 from disappearing without a trace?
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Space Shuttle Disaster - Preview
Airs Thursday, January 31, 2013 at 10:00 p.m. ET/PT. Check your local listings.
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Ultimate Cruise Ship Preview
Join pioneering shipbuilders as they embark on a feat of maritime engineering.
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Secrets of the Shining Knight Preview
Discover the world of medieval knights and see how their armor was made.
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Secrets of the Forbidden City Preview
How has China’s magnificent Forbidden City withstood centuries of earthquakes?