" Sin Nombre ." Atop the fright cars of a train running north through Mexico, hopeful emigrants ride toward their dream of the United States. Two stories: We follow a young woman from Honduras, and Casper, a young gang member who robs those riding on the cars. During the odyssey, scenes of great beauty join with others of the horrifying closed world of gangs. We realize that the difference between the two worlds is the scope of their dreams. An extraordinary debut by Cary Fukunaga , only 31. Won for direction and cinematography at Sundance 2009.