Ten days that may change humanity ended this afternoon, with the successful splashdown of the Orion capsule carrying the valiant crew of Artemis II. I was a junior high school student the last time humans traveled to the moon and back (December 1972). Commander Reid Wiseman, pilot Victor Glover, and mission specialists Christina Koch and Jeremy Hansen have gone where no one has since.

Hansen comes from the Canadian Space Agency, and he is the first of his countrymen to go to the moon. The other three crewmembers are longstanding NASA astronauts—2009 for Wiseman; 2013 for Glover and Koch. All four are heroes tonight.