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.

All of Tony Stark's Iron Man suits were just destroyed, forcing him to confront his greatest weakness if he wants to come ...

Iron Man's final form is the perfect illustration of how Tony Stark's obsession with machinery and his commitment to heroism ...