Cpl. Taylor Cross, a working-dog handler with 1st Battalion, 7th Marine Regiment, comforts his working dog, Vito, aboard Camp Leatherneck, Helmand province, Afghanistan, July 7, 2014. Vito, a 6-year-old purebred black lab, is trained to detect explosive material, both military and homemade. (U.S. Marine Corps photo by Cpl. Cody Haas/ Released) - Cpl. Taylor Cross, a working-dog handler with 1st Battalion, 7th Marine Regiment, comforts his working dog, Vito, aboard Camp Leatherneck, Helmand province, Afghanistan, July 7, 2014. Vito, a 6-year-old purebred black lab, is trained to detect explosive material, both military and homemade. (U.S. Marine Corps photo by Cpl. Cody Haas/ Released)