They didn't know what had happened. They only knew they had a job to do. Hundreds of search-and-rescue dogs worked alongside first responders at Ground Zero af

They didn't know what had happened. They only knew they had a job to do. Hundreds of search-and-rescue dogs worked alongside first responders at Ground Zero after 9/11, searching through the rubble for survivors and victims. They worked for hours in unimaginable conditions, often exhausted and cov…