MULLEN BRIEFING U.S. Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, addresses the media at the Pentagon, April 25, 2008. Mullen discussed several subjects, including Iran and the continued need to curb the spread of weapons of mass destruction. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 093552-N-DYK94-761.jpg Photo Gallery