Electric Planes on the Way With Greener, Cheaper Flights

NASA and other aircraft developers are looking for ways to drop the cost of fuel and lower the emissions for short-haul flights.

July 27, 2015
10:00 AM EDT
The HEIST truck was driven at speeds up to 70 miles per hour across a dry lakebed at Edwards Air Force Base, Calif., providing researchers with valuable data. | NASA/Tom Tschida