How to Reverse Yourself Out of a Cul-De-Sac

A plane can't literally go vertical and then up to 70,000 feet. It's high enough to see the curvature of earth. So Digby Dodd was coming an alarming amount for a man at that altitude. We'll be enjoying air travel though, possibly not as much as a Dodd-Bloomenthal - but we're off on tour.