During the long war in Iraq and Afghanistan, coalition forces relied on thousands of military working dogs to help keep them safe by detecting explosives, finding illegal drugs, searching for missing comrades, or targeting enemy combatants. Dozen died in the line of duty. Others struggle with wounds and post-traumatic stress. Many have earned recognition for heroism. Among the heroes is Lucca, a highly skilled German Shepherd/Belgian Malinois mix trained to sniff out explosives and protect the...