“There he is in free fall, experiencing the exhilaration of what he takes to be flight. From his great height he can see for miles around, and one thing he sees puzzles him: The floor of the valley is dotted with craft just like his—not crashed, simply abandoned. ‘Why,’ he wonders, ‘aren’t these craft in the air instead of sitting on the ground? What sort of fools would abandon their aircraft when they could be enjoying the freedom of the air?’ Ah
