Adm. Michael Mullen and Secretary Gates conduct a press briefing.
Chairman of the Joint Chiefs of Staff Adm. Michael Mullen, U.S. Navy, and Secretary of Defense Robert M. Gates 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.