In 1997, New Jersey–based photographer George Steinmetz decided to learn to fly, when he was assigned to shoot in the central Sahara and learned that his bush pilot had backed out. Steinmetz’s aircraft of choice was not an airplane but a motorized paraglider, which is more or less a backpack-mounted motor connected to a single-seat harness hanging under a parachute-like wing. “I originally got into paragliding because I wanted to fly in the Sahara,” he says, “and where I was in the Sahara you could take off and land almost…