Justice League of America #108

Synopsis

The three teams split up to tackle the machines controlling the Earth. When the three groups confront the final machine inside of an orbiting satellite, the machine reveals its origins of how the Nazis created it to help run things, but it eventually turned on its creators and Adolf Hitler himself seeing them as inferior per its programming. The last machine is destroyed by Red Tornado's sacrifice yet again, and the three groups, triumphant, return to their respective earths along with the surviving Red Tornado, who chooses to stay on Earth-1.