In the Marvel Universe, the Avengers team is composed of superheroes who work together in order to save the world from dire threats. Although this group has been comprised of heroes over the years, some villains have entered into the fold, too, only to come out as heroes in the end. Some examples include Hawkeye, Quicksilver, the Scarlet Witch, and most recently, Red Hulk (or Rulk).
Following the events of September 11, there have been movies (World Trade Center) and TV specials discussing the tragedy of this day as well as the heroism of police, firefighters, and first responders who braved the danger to help anyone they could.
