A crowd awaits a ping pong ball to pop during an exhibition at the USA Science & Engineering Festival in Washington, April 6, 2018. The free event continues until Sunday, April 8 until 4 (DoD photo by EJ Hersom)
Size: 4358px × 2906px
Photo credit: © AB Forces News Collection / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: dc, engineering, expo, science, sciencey, stem, usa, washington