EXCLUSIVE: Animal Planet has acquired the one-hour special The Hero Dogs Of 9/11 to commemorate the 12th anniversary of the September 11 terrorist attacks on the World Trade Center and the Pentagon.  The special first ran on Animal Planet in Canada two years ago to mark the attack’s 10th anniversary. The project, from Toronto-based Kelencontent, details the stories of three World Trade Center survivors, and the working dogs that saved lives at Ground Zero. More than 300 dogs were used in the rescue and recovery operation. One of the survivors profiled, who is blind, was led out of the building by his seeing eye dog. Another, who’d been working at the scene with a bomb-sniffing dog, was pulled from the rubble by a rescue dog. The third was the last survivor to be discovered by a dog and pulled from the rubble, 27 hours after the center collapsed.