Aired Tuesday June 22, 11:00am - 12:00pmon Smithsonian Channel HD

How Did They Build That?

Series 1 Episode 2: Towers & Roofs

Engineers bend two New York skyscrapers and connect them with a sky bridge 700 feet up; Singapore's 'Hive' is built without a single straight structural support. A canopy in Greece.

Cast and crew
  • Robin LeachDirector
  • Ned WilliamsDirector
  • Scott RummelHost
  • Matthew GravelleNarrator