" The last man on the moon, Gene Cernan, had paused for a final look at the black beauty of the world about him. He had a message to send home before departing. “As I take these last steps from the surface for some time in the future to come, I’d just like to record that America’s challenge of today has forged man’s destiny of tomorrow. And as we leave the moon and Taurus-Littrow, we leave as we came, and, God willing, we shall return, with peace and hope for all mankind.” It’s been nearly four decades since he spoke those words. No American, no earth being has yet returned to the moon. Sadly, no one will again for decades to come. "

― Alan Shepard , Moon Shot: The Inside Story of America's Race to the Moon