Detailing some of the structural reasons for the collapse of the World Trade Center buildings, employing computer animation and 9/11 footage to explain a National Institute for Standards and Technology report on the subject. Included: proposals to revise American building codes, such as increasing the width of stairways. Also: WTC lead engineer Leslie Robertson leads a tour of a complex on which he is working, the 101-story Shanghai World Financial Center.

NOVA Season 34 Episodes...

• s34e01 - Building On Ground Zero
• s34e02 - Mystery Of The Megavolcano
• s34e03 - The Deadliest Plane Crash
• s34e04 - Monster Of The Milky Way
• s34e05 - Wings Of Madness
• s34e06 - The Family That Walks On All Fours
• s34e07 - Underwater Dream Machine
• s34e08 - Percy Julian: Forgotten Genius
• s34e09 - The Last Great Ape
• s34e10 - Kings Of Camouflage
• s34e11 - First Flower
• s34e12 - Saved By The Sun
• s34e13 - Pocahontas Revealed
• s34e14 - Bone Diggers
• s34e15 - The Great Inca Rebellion

NOVA Show Summary

Seen in more than 100 countries, NOVA is the most watched science based television series in the world and the most watched documentary series on PBS. It is also one of television's most acclaimed series, having won many major television awards, most of them many times over.