Protector, helper, hero and companion? That's the military working dog. Here are 13 pictures that prove it.

March 13 marks National K9 Veterans Day, a day to honor and commemorate the service and sacrifices of American military and...

Of all the serious things in the Marine Corps, this is the most important. Sort of.

An honor guardsman played "taps" as retired working dog Rico was carried into a veterinary facility for the final time.

“Dog” is about the relationship between Army Ranger Briggs (Tatum) and Lulu, a Belgian Malinois military working dog.

These veterans all made a huge impact on the world after they completed their service.

Who can resist the temptation to adopt a retired military working dog?

Three months after his owner former President George H.W. Bush died, Sully raised a paw to continue his service.