On May 3, Swiss psychiatrist and adventurer Bertrand Piccard settled into the one-man cockpit of a spindly plane with the wingspan of a 747. The propellers started, and he eased down the runway near San Francisco Bay. As the sun rose, he turned southeast toward Phoenix, 18 hours and 18 minutes away.
Piccard could have driven to Phoenix faster. But his plane, the Solar Impulse HB-SIA, is meant to go slow.