<Tr> <Th> Budget </Th> <Td> $30 million </Td> </Tr> <Tr> <Th> Box office </Th> <Td> $3.3 million </Td> </Tr> <P> Machine Gun Preacher is a 2011 biographical adventure drama film about Sam Childers, a former gang biker turned preacher and defender of South Sudanese orphans . The movie was based on Childers' book Another Man's War . It was written by Jason Keller, directed by Marc Forster, and stars Gerard Butler, Michelle Monaghan and Michael Shannon . </P> <P> The film tells the story of Childers and his efforts to save the children of South Sudan in collaboration with the Sudan People's Liberation Army (SPLA) against the atrocities of the Lord's Resistance Army (LRA). </P>

What is the movie machine gun preacher about