Justice League of America #15

In "The Challenge of the Untouchable Aliens!", Superman and Wonder Woman race to protect the Satellite Sky Fortress from a deadly threat, only to discover a mysterious cannon aimed at Central City. When The Flash spots the danger, the duo destroys the weapon and calls upon the Justice League to confront a global mystery: stone giants that defy all physical contact. Written by Gardner Fox and illustrated by Mike Sekowsky, with inks by Bernard Sachs and lettering by Gaspar Saladino, this 1962 classic features a cover by Mike Sekowsky and Murphy Anderson.