Spc. Popular, a 68W with the 411th Hospital Center (FWD), preps an I.V. for Jack, a military working dog with the 407 Expeditionary Security Forces Squadron as part of his health checkup. She is assisted by Jack's handler U.S. Air Force Staff Sgt. Hannah Morrero, U.S. Army Reserve Lt. Col. Smith, a veterinarian and U.S. Army Reserve Sgt. Green, a veterinary tech.