Keywords: U.S. Navy Adm. Mike Mullen laughs with David Letterman, 2011.jpg U S Navy Adm Mike Mullen left the chairman of the Joint Chiefs of Staff laughs with David Letterman on the Late Show with David Letterman in New York City June 13 2011 Mullen was making his first appearance on the show DoD photo by Mass Communication Specialist 1st Class Chad J McNeeley U S Navy/Released https //www flickr com/photos/39955793 N07/5832959123/ 110613-N-TT977-104 2011-06-13 16 20 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 N07/5832959123 2016-09-03 14 13 27 United States Government Work Michael G Mullen David Letterman The Late Show United States Department of Defense |