President Obama congratulates Chairman of the Joint Chiefs of Staff Adm. Mike Mullen, President Barack Obama congratulates Chairman of the Joint Chiefs of Staff Adm. Mike Mullen, U.S. Navy, during the chairman of the Joint Chiefs of Staff change of responsibility ceremony at Summerall Field, Joint Base Myer-Henderson Hall, Va., on Sept. 30, 2011. Mullen was succeeded by Army Gen. Martin E. Dempsey as the 18th chairman of the Joint Chiefs of Staff. SHARE: Download: Full Size (0.06 MB) Credit: VIRIN: 851597-G-ISF56-129.jpg Photo Gallery