Captain America (1968 series) #100

Captain America, frozen in ice for twenty years, is worshipped as an idol by Eskimos until the Sub-Mariner hurls him into the sea. Partially thawed, Cap is discovered and revived by the Avengers and recalls the death of his partner Bucky…until his delirium passes and he finds himself with the Black Panther still a prisoner of Bucky’s killer, Baron Zemo. Zemo has ordered the spy Irma Kruhl (actually Agent Thirteen in disguise) to execute the two heroes to prove her loyalty. She fires and Cap easily dodges; she then distracts Zemo by reminding him of her mission: to deliver the location of every missile base on Earth. While the villain aims his deadly solar ray at the first target, Thirteen reveals a hidden miniature flame thrower and destroys the control panel. Cap and the Panther swing into action and the trio fights their way past the guards in pursuit of Zemo, escaping through a tunnel. At the end of the tunnel is a deadly robot, the Destructon, which Cap manages to defeat after an intense struggle. Zemo and his guards arrive and the villain orders them to fire on the heroes. Cap has a revelation, though: Zemo is an imposter, his mask is not firmly glued on. He is Zemo’s pilot, impersonating his dead master, carrying out his mission. The embittered guards kill the deceiver. The Black Panther persuades the now leaderless mercenaries to surrender. SHIELD shoots down the orbiting death ray, and the heroes return to America, with Captain America proposing the Black Panther take his place in the Avengers.