11 terrorist attacks, the 9/11 Memorial & Museum staff wrote: "The search for signs of life or human remains was mentally and physically taxing on the dogs, as the SAR [search and rescue] dogs ...

"It was at that time that we kind of realized the importance and the capability that dogs can bring to search and rescue. Every environment presents different difficulties, but it's all restricted ...

K9 Veterans Day on March 13 honors the service of military and working dogs, inspired by Stubby, the first dog promoted to sergeant.