2018 USA Science and Engineering Festival

Attendees listen to a NASA staff member speak about the X-57, a research aircraft powered by 14 electric motors, during Sneak Peek Friday at the USA Science and Engineering Festival, Friday, April 6, 2018 at the Walter E. Washington Convention Center in Washington, DC. The festival is open to the public April 7-8. Photo Credit: (NASA/Joel Kowsky)