TWO CHAIRMEN Navy Adm. Mike Mullen, chairman of the Joint Chiefs of Staff, shares a laugh with retired Army Gen. Colin Powell at the 2011 National Memorial Day Concert reception at the National Statuary Hall in the U.S. Capitol in Washington, D.C. on May 29, 2011. Powell served as chairman of the Joint Chiefs of Staff and later as secretary of State under under President George H.W. Bush. SHARE: Download: Full Size (0.05 MB) Credit: VIRIN: 196853-M-GFM72-166.jpg Photo Gallery