IRON MAN 246 (1968)

"Heavy Mettle!" Part 2 of 4. Plot by David Michelinie and Bob Layton. Script by David Michelinie. Pencils by Bob Layton. Inks by Herb Trimpe. Cover by Bob Layton. Hydra and the Maggia are at war on the west coast! And Iron Man wants to know why! FBI agents drop by Stark Enterprises and tell Tony where a group of Dreadnoughts are located! Shell-Head cautiously follows the g-men's lead to an abandoned airfield and runs into the Dreadbusters instead! What are these machines and why is Advanced Idea Mechanics operating them? Every criminal organization in the world seems to be targeting the Invincible Iron Man! Cameo appearances by Jim Rhodes, Marcy Pearson, Rae LaCoste, Kathy Dare, Abe Zimmer, and Mrs. Arbogast. Flashback cameo by the Sub-Mariner.