Keywords: Defense.gov News Photo 090511-N-2855B-134.jpg en Secretary of Defense Robert M Gates left and Chairman of the Joint Chiefs of Staff Adm Michael Mullen U S Navy conduct a press briefing where they announce Army Lt Gen Stanley McChrystal is to replace Army Gen David D McKierna as commander of NATO's International Security Assistance Force and U S forces in Afghanistan in the Pentagon on May 11 2009 090511-N-2855B-134 http //www defense gov/photos/newsphoto aspx newsphotoid 11245 2009-05-11 en Petty Officer 1st Class Molly A Burgess U S Navy PD-USGov-Military Import by User Slick-o-bot/Defense gov News Photos Robert Gates in 2009 Taken with Nikon D2Xs |