a presentation of U.S. Department of the Interior, National Park Service ; an Aperture Films, Ltd. production ; directed by Joshua Colover ; produced by Joshua Colover, Joseph Erb ; written by Shane Smith
Dartmouth Films ; Raindog Films presents ; a Raindog Films production ; in association with Bedlam Productions ; a Lorna Tucker film ; directed by Lorna Tucker ; producers, [Lorna Tucker], Ged Doherty, Colin Firth, Nuala O' Leary, co-producer Andrea Vecchiato ; [screenwriter, Lorna Tucker]