Kay Blackstock’s pride in the building shows throughout her corner office, from the celebratory photos covering the walls to the shovel used in the groundbreaking ceremony. But she also realizes that Georgia Mountain Food Bank, marking its second anniversary today at its Calvary Industrial Drive location, has hit something of a crossroads. The Atlanta Community Food Bank affiliate has seen a clear rise in community needs over time but a sharp drop in donated “salvage” foods, or items pulled from shelves because they aren’t selling or are getting close to expiration dates.