XAVIER'S SCHOOL UNDER SIEGE, THE X-MEN....ABDUCTED! Now pawns of the mysterious Weapon X program, the mutant heroes' only hope lies with the one team member to evade capture: the enigmatic, unproven Wolverine ! Can Logan go it alone against the shadow-ops organization that transformed him into one of the world's most lethal killing machines? To succeed, he must survive an adrenaline-charged, adamantium-laced brawl with the savage Sabretooth -- a predator every bit his equal! The Second ULTIMATE X-MEN story arc, "Return to Weapon X" features the ultimate universe debuts of Nightcrawler, Juggernaut, Rogue and NIck Fury --- and the return of the Brotherhood of Mutants! Ultimate X-Men (2000) #7-12.