Roar: Hear Pittsburgh Zoo's littlest lion cub's loudest roar

Pittsburgh's Golden Triangle skyline has been fundamentally rebuilt twice in living memory -- first during the postwar Renaissance that followed the smoke control ordinance, replacing industrial waterfront with Gateway Center's steel and glass, then again during the 1980s second Renaissance that produced PPG Place, One Oxford Centre, and Fifth Avenue Place while the steel mills along the rivers were simultaneously closing, the city rebuilding its downtown identity at exactly the moment its indus