Daily Comic Book Mission #030: G.I. Joe: A Real American Hero #3

G.I. Joe: A Real American Hero #3 (September 1982) published by Marvel Comics, titled "The Trojan Gambit". Cobra sneaks a murderous, gigantic robot inside G.I. Joe's super-secret base codenamed "The Pit." Can the Joes stop it in time before it gives away their location to Cobra Commander?