ELLSWORTH AIR FORCE BASE, S.D. -- Staff Sgt. Christopher Darrow, 28th Security Forces Squadron dog handler, stands ready to conduct training with his military working dog, Bak, June 24. Sergeant Darrow has been a dog handler slightly more than four months, with Bak as his first MWD. (U.S. Air Force photo/Airman 1st Class Anthony Sanchelli)