Vengeance in Vietnam! An Avenger exposed! Learn the soul-searing secret hidden in Iron Man's past!

Tony Stark reflects on one of his early Iron Man adventures in Vietnam. A special weapon built by Stark Industries is responsible for a large number of military and civilian casualties. As a result of seeing the fatalities up close, Tony decides to stop manufacturing weapons of war. Flashing forward to the present, Stark renews his vow not be involved in weapons production ever again.