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At any one time, there are a million people airborne somewhere in the world. That equates to an entire airborne city - a city in the sky. So what does it take to run a city at 30,000 feet? In this series, we set off around the world to uncover the invisible global networks and complex logistics that make it all possible.

City in the Sky airs Tuesday at 1:00 p.m.

Episodes

Season 1
Episode 3
There are around a million people airborne at any one time. But what goes up must come...
Season 1
Episode 2
We take flight for granted, but on any journey a hidden army of people keep your plane...
Season 1
Episode 1
What does it take to get a million people off the ground and up in the air? Explore the...


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What does it take to keep a million people airborne at 30,000 feet across the globe?