Keywords: 130626-D-HU462-030 (9150564629).jpg U S Service members stand at attention as Chairman of the Joint Chiefs of Staff Army Gen Martin Dempsey invites Canadian Forces' Chief of the Defense Staff General Thomas J Lawson to participate in the U S - Canada Defense Chiefs Strategy Dialogue at National Defense University's Roosevelt Hall on Fort McNair in Washington D C June 26 2013 DoD photo by Staff Sgt Sean K Harp U S Army/Released https //www flickr com/photos/39955793 N07/9150564629/ 130626-D-HU462-030 2013-06-26 08 30 https //www flickr com/people/39955793 N07 U S Department of Defense Current Photos PD-USGov U S Department of Defense Current Photos https //flickr com/photos/39955793 N07/9150564629 2016-09-03 08 33 51 United States Government Work District of Columbia United States Department of Defense |