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.
Aired: 02/22/17Video has closed captioning.
The full episode is no longer available for online streaming. Why?
Please continue to enjoy extra(s) from this episode. The full episode is still available for purchase through the "Buy Now" links.