Iron Man is quite possibly the most iconic hero in the Marvel Cinematic Universe, and for good reason. First recognized as the charming if arrogant billionaire tech genius Tony Stark, he was forced to ...

Following is a transcript of the video. Narrator: If you look at Iron Man's first suit, the Mark 1, and compare it to the hero's nanotech suit from "Avengers: Endgame," a lot has changed.