Among all the fantastical superhero figures parading at this year's Comic-Con was an elegant and modest man who has earned the moniker "hero" in real life.

John Lewis began life as the son of sharecroppers on a farm in rural Alabama.

He went on to speak alongside Martin Luther King Jr. at the March on Washington and become a U.S. congressman.

His incredible life story is now a graphic autobiography entitled "March".

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