#OnThisDay in 1960 #TheGuardiansOfTheUniverse debuted in #GreenLantern #comics #1 #ExtraterrestrialMasters of #TheGreenLanternCorps whoHijack #anEnergyDuplicate of #GreenLanternHalJordan65 toTheirCouncil on #Oa toExplainTheCircumstances of how he obtained #AbinSur’s #PowerRing & his role in #GLCorps