“The violence in this country, especially as it effects African-American men and boys, is not a problem,” Mayor Michael Nutter said last night at a screening of the new film, Fruitvale Station. “It is an epidemic, it is a disease…. We need to do something about it.” Standing before a packed theater of invited guests from Philadelphia youth groups, including the Mayor’s Violence Prevention Workshop, the Youth Violence Reduction Partnership and other city and community initiatives, the Mayor introduced the film – a wrenching dramatizion of the events leading up to the New Year’s Day, 2009, shooting death of Oscar...