A major move by Bratton in his first month back at the helm of the NYPD: Rookie cops will no longer be assigned to anti-crime operations targeting high crime neighborhoods, because, Bratton says, precinct assignments provide a more-rounded post-Police Academy experience.  Here’s what else the new policy gets at–an entrenched system where vets land in softer assignments because newbies get assigned to the tough ones (shades of urban public schools); and high-intensity enforcement in poor and minority neighborhoods spearheaded by mostly middle-class rookies–both black and white–who, for the most part, are strangers in a strange land.  Talk about a policy that deals with critical variables.