U.S. Air Force military working dog Ootter, assigned to the 355th Security Forces Squadron, barks at another 355th SFS member during a demonstration at Davis-Monthan Air Force Base, Ariz., Sept. 29, 2016. The 355th SFS mission is to protect, defend and fight to enable Air Force, joint and coalition mission success.  (U.S. Air Force photo by Airman 1st Class Mya M. Crosby)
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