Next on Episode 3
Preview: Episode 3 | 30s
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.
Aired: 02/22/17Video has closed captioning.
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We take it for granted, but on any journey a hidden army of people keep your plane safe.
Inspectors get 45 seconds to ID and pick up fallen debris, across a whole runway.
Explore a midair metropolis of a million people on flights that crisscross the world.