Tales of Suspense #66
In "If I Fail, a World Is Lost!", Tony Stark faces mounting pressure as Senator Byrd audits his factory, setting the stage for a tense showdown. When Happy volunteers to test Stark’s new submarine—only to vanish after Iron Man takes the plunge—Tony must confront Attuma beneath the waves, where a desperate battle unfolds. Written by Stan Lee and illustrated by Don Heck with inks by Mickey Demeo, this 1965 tale of duty and danger features a cover by Jack Kirby and Frank Giacoia.
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Senator Byrd has come to audit Stark's factory. He is displeased that Stark kept him waiting. Happy decides to impress Pepper by offering to test Stark's new submarine. Tony insists that Iron Man does the testing. Happy leaves feeling disgruntled. Under the sea, Iron Man in the sub stumbles across Attuma who is preparing to attack the surface world. They battle. Iron Man destroys Attuma's weapon by ramming it with the sub. Iron Man survives the resulting explosion and has to explain the failure of the test to Byrd, who is highly critical of Stark. Happy, meanwhile, is nowhere to be found.
Plot details indexed by the Grand Comics Database (CC BY-SA).