Trained rescue dog Gus and his trainer Ed Apple from the Tennessee Task Force One Search & Rescue team searching for survivors in the wreckage at the Pentagon. (Photo by Mai/Mai/Time Life Pictures/Getty Images)
Trained rescue dog Gus and his trainer Ed Apple from the Tennessee Task Force One Search & Rescue team searching for survivors in the wreckage at the Pentagon. (Photo by Mai/Mai/Time Life Pictures/Getty Images)