At 100, Steubenville native Harry J. “Buff” Buffone distinguishes himself on two fronts. For one thing, he’s among a growing group of centenarians, as more people enjoy longevity and reach the 100-years-old mark. But as a veteran of World War II, he’s in a diminishing circle of men and women, too, as the ranks of those who fought and won the great conflict are dwindling.