80 Page Giant Magazine #8

The Justice League of America uses the occasion of its third anniversary to tell Snapper Carr and Green Arrow about the formation of the League, involving the discovery of strange meteors that nearly doomed them forever. When seven meteors are sent to Earth by aliens from the planet Appellax, six superheroes of our world individually overcome the beings that emerge from them. They then come together to combat the seventh menace and vow to form the Justice League of America.