George Carruthers, center, principal investigator for the Lunar Surface Ultraviolet Camera, discussing the Lunar Surface Ultraviolet Camera with Apollo 16 Commander John Young, right. From left are Lunar Module Pilot Charles Duke and Rocco Petrone, Apollo Program Director. This photograph was taken during an Apollo lunar surface experiments review in the Manned Spacecraft Operations Building at the Kennedy Space Center. NASA image 71P-0544, via Wikimedia Commons