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.

Robert Downey Jr.’s Iron Man has not only been the face of the ... group of terrorists in the Afghan desert. As basic as the Mark I suit was, it still packed enough firepower to blow through ...