“84th floor, West Office, 12 people trapped.” Those are the seven words Randy Scott scribbled on a scrap of paper on September 11, 2001, after United Airlines Flight 175 struck Two World Trade Center floors away from where Scott was working at Euro Brokers Inc.

The blood-stained note, which drifted to the street from the building’s 84th floor, has brought both pain and insight to Scott’s devastated family, who believed the 48-year-old died instantly, a decade after the Twin Towers fell.