Dr. Rory A. Cooper, founder and director of the University of Pittsburgh Human Engineering Research Labs, and Marine Corps Sgt. Maj. Ronald L. Green, sergeant major of the Marine Corps, speak with a group of military guests during a sunset parade reception at the Women in Military Service for America War Memorial, Arlington, Va., June 28, 2016. Sunset parades are held as a means of honoring senior officials, distinguished citizens and supporters of the Marine Corps. ( Marine Corps photo by Lance Cpl. Paul A. Ochoa)

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Photo credit: © AB Forces News Collection / Alamy / Afripics
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