I doubt we'll ever know, in any clinical or scientific sense, what draws us to dogs so fiercely; what compels us to seek out their companionship, even in the most harrowing of circumstances. But we do. Because no matter how bad things are, no matter how bad things might get, the presence of a dog somehow makes things seem a little better. A scratch behind the ear, the wag of a tail, a warm body curled up at your feet; pharmaceutical companies would pay any price to synthesize how that makes us feel. But of course you can't just manufacture that kind of emotion and stuff it in a pill. It comes from a place pharmacology can't yet touch. That's why half a world away, in a place of constant death and misery, our soldiers still seek out dogs.