There are over 300 registered superheroes in the United States. Coming from all walks of life, they patrol the streets, stop crimes, and do community outreach in homemade costumes. While each real life superhero has a different reason for taking up the cause, the one thing that's certain about this eccentric bunch of concerned citizens is that their ranks are growing: The New York Initiative, a New York City-based collective of superheroes, has gone from four members to 12 in 2011.
The 2011 documentary "Superheroes" (trailer below) followed the real caped crusades of Zimmer Barnes, aka Zimmer, and Chris Pollak, aka The Dark Guardian. Both are members of The New York Initiative, a New-York City-based collective of real life superheroes.