Astronaut Eugene Cernan flew three space missions, including Apollo 10, the dress rehearsal for the moon landing, and Apollo 17, which he commanded and which made the final, manned landing on the moon in December, 1972. Cernan and astronaut-geologist Harrison Schmidt spent three days on the lunar surface, the longest stay of any of the Apollo landing missions. Cernan, who's retired now, was in Portland Thursday for a Salvation Army "Champion for Kids" fundraising event. He spoke with MPBN Morning Edition host Irwin Gratz.