When a sniper’s bullet struck Pfc. Colton Rusk, the first to reach his body was his best friend Eli– a bomb-sniffing, black Labrador so loyal he snapped at other Marines who rushed to his fallen handler. Military dogs are supposed to sleep in kennels when deployed, but Rusk broke the rules and let Eli curl up with him on his cot. Other times, the dog took up the entire sleeping bag. Rusk ate ready-to-eat meals, so that’s what Eli ate instead of dog food. "Whatever is mine is his," Rusk wrote.