Tales of Suspense Vol 1 #84 - CGC 5.0

Tony Stark has presented himself before the US Senate for a committee meeting to reveal the secrets of Iron Man for national security, however before Tony Stark can say anything on record, he suffers a heart attack and the whole world learns that Tony Stark has a chest plate that is keeping him alive.

Admitted to a hospital and with Pepper Potts and Happy Hogan at his side, Stark has to reveal why he has had to wear the chest plate, to prevent shrapnel from piercing his heart. It isn't long before the press starts wondering why Tony Stark and Iron Man are never seen in the same place together.

In order to protect Stark's secret identity, Happy dresses up in the Iron Man armor and allows himself to be seen in public while Stark is in the hospital. When his mission is complete, Happy returns to Stark's hospital room to return the armor, as Stark is thanking him, Happy is suddenly teleported away by the Mandarin