‘Sin Nombre’ unmasks Mexican gang culture

If riding on top of a Mexican freight train while bandits lie in wait, or inviting real-life gang members to improvise street battles doesn’t sound like the wisest approach to making your first feature film, try telling Cary Fukunaga. Because those are exactly the scrapes the 32-year-old writer-director got into during production of his highly-acclaimed debut “Sin Nombre.” Set in Mexico against the backdrop of the country’s ballooning people trafficking problem, Fukunaga’s social-political thriller shows one boy’s struggle to escape Mexican gang culture after meeting a Honduran immigrant girl.