Machine Gun Preacher

The story of Sam Childers, a former drug-dealing biker tough guy who found God and became a crusader for hundreds of Sudanese children who’ve been forced to become soldiers.

Director: Marc Forster
Writer: Jason Keller
Stars: Gerard ButlerMichelle Monaghan and Michael Shannon

Source (imdb)

[youtube]http://www.youtube.com/watch?v=eddnloOFjwY&feature=relmfu[/youtube]