(Providence, RI) -- Providence is filling a big shortage as it graduates 83 new firefighters from the training academy. Yesterday's graduates are the department's most diverse recruiting class and fills most of the 100 positions vacated by retiring firefighters since the mayor imposed a shift change two years ago. City Councilman John Igliozzi has criticized Mayor Elorza's plan as overtime costs have risen more than six million dollars over those two years. The mayor says going forward there will be a savings of more than five million dollars.