Solar Impulse 2 pilots Bertrand Piccard, right, and Andre Borschberg celebrate after Piccard landed their solar-powered plane at Moffett Field in Mountain View, Calif., on Saturday, April 23, 2016. The solar-powered airplane landed in California on Saturday, completing a risky, three-day flight across the Pacific Ocean as part of its journey around the world. (AP Photo/Noah Berger)