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Army Pfc. Landon Kelsey (right), a 1st Armored Division military working dog handler, places his hand on his MWD, Arthur, as Air Force Lt. Col. Brent Waldman (left), the 386th Expeditionary Medical Operations Flight commander, performs a root canal procedure on the MWD at an undisclosed location in Southwest Asia, Aug. 30, 2017. The MWD received a root canal to prevent infection after it recently broke a tooth during controlled aggression training. (U.S. Air Force photo/Tech. Sgt. Jonathan Hehnly)