Filmmaker Michael Mann, already in business with HBO on the drama series Luck, is also behind a new limited documentary series ordered by the premium cable network. Witness, which will follow a new generation of young combat photographers into conflict zones in Mexico, Brazil, Uganda and Libya, is a collaboration between Mann and documentary director David Frankham. “David Frankham and I share an admiration for combat photography that captures the universal — and sometimes the indescribable — in a single frame in the midst of chaos and danger,” Mann said. The first episode of Witness was shot in Juarez, Mexico. The next three are currently in production.