On Sept. 11, 2001, my guide dog (for the blind), Roselle, and I were working in the World Trade Center on the 78th floor of Tower One when the airplane crashed into our building. From the outset, Roselle guided and did her job perfectly, as we went to the stairwell and traveled down 1,463 stairs. After leaving the building, we were across the street from Tower Two when it collapsed. Despite the dust and chaos, Roselle remained calm and totally focused on her job, as debris fell around us and even hit us. We found a subway entrance, where we could escape the heavy dust. All that day, Roselle worked flawlessly. She saved my life and truly is the greatest dog hero of all.