Soaring at 26,000 feet without a drop of fuel, nothing is predictable, including weather, technology and the fate of the pilots.

Bertrand Piccard, psychiatrist and balloonist, and André Borschberg, engineer and jet-fighter pilot, built what many experts said was impossible—a solar-powered airplane capable of flying day and night.

This story of hope, courage and perseverance is our special presentation for Earth Day.

In Person: filmmakers Quinn Kanaly and Noel Dockstader