"ESTADO FAIR  Cover pencils by Jack Kirby, inks by Frank Giacoia. The Origin of Professor X!, script by Stan Lee, pencils by Jack Kirby (layouts) and Alex Toth (pencils), inks by Vince Colletta; Cerebro detects a powerful mutant and Xavier fears that he knows who it is; The X-Men prepare the mansion for an all out assault; As the mysterious villain batters his way through the mansion's defenses, Professor X tells his students his origin story and how his step-brother changed from tormenting bully to an unstoppable Juggernaut; 1st appearance of the Juggernaut. 36 pgs.   Published Sep 1965 by Marvel"