U.S. Secretary of State Hillary Clinton welcomes U.S. Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, to the U.S. State Department during the Australian Ministerial, April 9, 2009. U.S. Secretary of State Hillary Clinton welcomes U.S. Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, to the U.S. State Department during the Australian Ministerial, April 9, 2009. SHARE: Download: Full Size (3.95 MB) Tags: Photo Essays Credit: VIRIN: 583831-U-WKX80-376.jpg Photo Gallery