From Wikipedia, the free encyclopedia David Nixon is an American film director and film producer. He is the director and producer of Letters to God and a co-producer and assistant director of Fireproof and Facing the Giants. He is the creator of the film company Possibility Pictures and President of DNP Studios. DNP Studios has produced commercials for Subway Restaurants, Nickelodeon, the New York City Convention and Visitors Bureau, Campus Crusade and Walt Disney World. He is the son of missio ...