OBAMA'S CHOICE President Barack Obama announced Army Gen. Martine E. Dempsey as his choice as chairman of the Joint Chiefs of Staff during a Rose Garden ceremony May 30, 2011. Here, Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, speaks with Dempsey prior to the 2011 National Memorial Day Concert at the U.S. Capitol in Washington, D.C., May 29, 2011. SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 896308-J-RSU87-953.jpg Photo Gallery