"The Great Space Travel Hoax"
A rash of alien sightings and recent tampering with a NASA rocket sets Superman off on a lengthy investigation. It leads him to the door of Gustav J. Arno and his band of space-travel disbelievers.
"The Computer That Saved Metropolis" insert comic (found in various July 1980 titles) reprints the July 1980 Radio Shack free comic of the same name.