U.S. Customs and Border Protection, Office of Field Operations, Agriculture Specialist Bob Stone and his dog Ferro conduct a demonstration for lawmakers during testimony before the House Homeland Security Oversight and Management Efficiency Subcommittee in a hearing on "critical canine contributions to the DHS mission" in Washington, D.C., May 18, 2017.
U.S. Customs and Border Protection Photo by Glenn Fawcett. Original public domain image from Flickr