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CITY IN THE SKY
Next on Episode 2
- Aired: 02/15/2017
- 00:30
- Expires:
- Rating: TV-PG

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Official Trailer
Explore a unique metropolis—a midair “city” composed of nearly a million people on flights that crisscross the world daily. Meet the hidden army working to keep the city aloft and uncover the exceptional engineering and technology that make it work.
The ‘Jet Men’ and the Principles of Flight Explained
The ‘Jet Men’ rely on the same fundamental laws of physics that underpin flight for even the biggest jet-liners. Unlike your average flight though, they start by leaping from a helicopter to build up enough speed and lift to keep them airborne. It’s a high-risk operation, and has taken years of training to achieve.
Next on Episode 3
There are around a million people airborne at any one time. But what goes up must come down - and getting passengers safely back to earth depends on complex global networks and some astonishing technology.
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