Kenny Carr certainly does look like a repurposed military story. However they didn't have to re-letter anything but the logo and opening caption. Nothing else refers to Mars or anything else science-fictional. I notice however that Carr's last name has been re-lettered throughout. So the original hero must have been Kenny [SomethingElse]. On the same subject, Gale Allen flies a propeller-driven plane to Saturn. Some feat! Obviously the editor/writers didn't give a hang...like Dr C suggests, they just plugged a few s-f words into some old adventure stories.
Link to the book:
Planet Comics 04 (paper/3fiche)