Staff photographer Peter Diana has been documenting Pittsburgh's professional sports teams for more than a quarter century. He's covered three of Steelers' six Super Bowl appearances and each of the three Penguins' successful Stanley Cup runs. In addition, Mr. Diana's photographs have illustrated two books, "Driving Home: My Unforgettable Super Bowl Run, "by Jerome Bettis, and "Mario Lemieux: The Final Period," by Mario Lemieux. You can follow him on Twitter @peterdianapghpg.