Saying goodbye to a building is one thing. Bidding farewell to people is another. When I think about the closure of Aqueduct Racetrack this Sunday, what first comes to mind isn’t the image of that retro-looking grandstand or the intensity of those howling winter winds on the apron. It’s the faces. The people who filled one of America’s great racetracks (certainly one of its grittiest), those who made Aqueduct what it ultimately became.