Tales of Suspense #61

Pepper and Happy, unsettled by Tony Stark's disappearance, go to Iron Man and tender their resignations. The following day, Happy, playing detective, breaks in to Stark's home. Tony is wearing his armor but not his helmet. He conceals his armor by jumping into bed. He assures Happy that all is well and that Iron Man should be trusted. The Mandarin uses his giant space-laser to destroy much of Stark's factory. He seemingly kills Stark. Stark as Iron Man disguises himself as a bearded man in a large coat, and boards a plane for China. He confronts Koto, the Mandarin's robot, and is defeated.