Keywords: Man's Best Friend (21465311796).jpg Sgt Derek Patrick a military working dog trainer from Marine Corps Base Camp Pendleton demonstrates the capabilities of his military working dog at the fields behind the University of Phoenix Stadium at Glendale Arizona Sept 11 2015 The demonstration was part of Marine Week Phoenix which allows the Marine Corps to showcase its traditions history and values U S Marine Corps photo by Sgt Cuong Le/Released https //www flickr com/photos/marine_corps/21465311796/ Man's Best Friend 2015-09-16 11 51 https //www flickr com/people/40927340 N03 Marines from Arlington VA United States PD-USGov United States Marine Corps Official Page https //flickr com/photos/40927340 N03/21465311796 2016-09-03 21 56 42 United States Government Work Glendale Arizona Military working dogs of the United States |