Solar Impulse is currently streaming today's takeoff, which has been delayed several times due to inclement weather, live. Takeoff is planned for 6PM UTC, or 2PM ET.

The flight should take a five full days. It's the longest leg of the plane's 12-segment around-the-world journey, during which Borschberg has shared piloting duties with Bertrand Piccard. We recently spoke to Borschberg about the challenges he'll face during the flight, like sleeping in 20-minute bursts at deep-freeze temperatures.