When the Army contacted Sgt. Bos and asked if he would be interested in keeping Celia, a bomb-sniffing army dog that he formed a special bond with while serving together in Iraq, Sgt. Bos excitedly agreed.

K9 units are a critical part of the teams that protect our country.

A special camaraderie exists between those who serve.

Watch this news story about the training and the bravery of some of the nation's most interesting warriors.

Four paws, a tail, and the heart of a hero!