Drew Nyman patrols with Emily, a Belgian Malinois shepherd deployed to sniff out insurgent humans in their hidey holes.

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At his feet, "Corporal Jerry, " a Belgian Malinois, wags his tail.

NPR: Dogs of War Play Key Role in Iraq

The working Belgian Malinois and a German Shepherd puppy were taken from the dog training centre to an emergency vets, but both later died from heat exhaustion.

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Mostly Belgian Malinois and German shepherds, some Labrador retrievers and golden retrievers, these war canines are trained to take bullets for their comrades, detect roadside bombs and sniff out other dangers.

NPR: Dogs of War Play Key Role in Iraq