Twenty-five years ago, Surry resident Diana Merenda peered out of her office window in lower Manhattan’s Deutsche Bank building, connected by an overpass to the South Tower of the World Trade Center. What she saw still brings her, and those with whom she shares her story, to tears a quarter of a century later. “I looked out my window, and I saw the hole in the tower,” Merenda said Friday, recounting the experience for a small group of people at …