He favors a project to send people to Mars, but he also wants to see American astronauts return to the one place he never reached, the surface of the moon.
VOA: standard.2010.04.04
"Perhaps one day a student selected for the Red Rover Goes To Marsproject will become one of the first astronauts to actually land on Mars itself, " Glenn said.
Cameron said everyone should sit up and take notice of the ISS, which he said was an extraordinary project and one he hoped would be a stepping stone to Mars.