The 9/11 Dogs: The heroes who searched for survivors at Ground Zero

Meet the dogs who searched for life amongst the ruins of the Twin Towers.

Many heroes were made on 9/11 and in the weeks that followed. Not all of them showed human courage. Some of them could only show that they were truly man's best friend. German Shepherds, Labradors and Spaniels accounted for the majority of the four-legged heroes.

Over three hundred search and rescue dogs worked the pile at Ground Zero and the crash site at the Pentagon. For hours they searched, fighting off exhaustion w...